## Summary

Implements #181573

This PR allows users to create, update and delete templates using
existing configure API

Flaky test runner:
https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/5846

Test via Postman: 
- Can create the template 
- Can update the template
- Can delete the template
- Maximum 10 templates allowed
- Template cases fields are validated as per the existing schema
- custom fields within templates are validated as per the existing
schema

### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [x] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed

## Summary

Parent issue: #181309

This PR adds optional tags field in template. 

### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

---------

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

## Summary
Merging into feature branch.

Implements create functionality
#181864

Add template from case settings page.

<img width="1728" alt="image"
src="https://github.com/elastic/kibana/assets/117571355/4a4565e5-3ca8-4a7c-a5c9-0ac15b72a0d0">

**How to test**
- Go to Cases > Settings
- Click on add templates
- Fill the form
- Save

Scenarios: 
- Create template with different custom fields
- Create template  with connector

Flaky test runner
[here](https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/6213)

### Checklist

Delete any items that are not applicable to this PR.

- [x] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [x] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [x] Any UI touched in this PR is usable by keyboard only (learn more
about [keyboard accessibility](https://webaim.org/techniques/keyboard/))
- [x] This renders correctly on smaller devices using a responsive
layout. (You can test this [in your
browser](https://www.browserstack.com/guide/responsive-testing-on-local-server))

---------

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

## Summary

Merging into feature branch.

Implements edit and delete functionality
#181864

Edit or delete template from case settings page.


https://github.com/elastic/kibana/assets/117571355/f6fd45fa-c1eb-45ab-8936-02c764dbadc4


**How to test**
- Go to Cases > Settings
- Add a template
- Click on edit template icon
- Update the fields
- Click save

- Click on delete template icon
- Click on confirm modal
- Click save

**Scenarios:** 
- Edit template with different custom fields
- Edit template  with connector
- Delete template

**Flaky Test**
[here](https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/6331)

### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [x] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [x] Any UI touched in this PR is usable by keyboard only (learn more
about [keyboard accessibility](https://webaim.org/techniques/keyboard/))

---------

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

… template's custom fields via API (#186608)

## Summary

Parent issue: #181309

This PR takes care of below scenario:
When user deletes custom fields via API, those custom fields need to be
removed from templates as well.

[Flaky test
runner](https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/6377)

**Testing**

- create a custom field in settings page
- create a template with that custom field in settings page
- Get configuration via postman for same owner, should have customFields
and templates attribute similar to this:
```
[
    {
        "customFields": [
            {
                  "key": "new_custom_field_key_2",
                  "type": "toggle",
                  "label": "My toggle custom field",
                  "required": "false",
            }
         ],
        "templates": [
            {
                "key": "template_key_1",
                "name": "Template with CF1",
                "caseFields": {
                     "customFields": [
                        {
                            "key": "new_custom_field_key_2",
                            "type": "toggle",
                            "value": false
                        }
                    ]
                },
            
            },
        ],
        "version": ${config_version}
        "id": ${config_id}
    }
]
```
- run the patch request via postman to delete the custom field, e.g:
```
path: https://localhost:5601/api/cases/configure/config_id

body: 
{
        "customFields": [],
        "templates": [
            {
                "key": "new_template_key_1",
                "name": "New template",
                "caseFields": {
                    "customFields": [
                        {
                            "key": "new_custom_field_key_2",
                            "type": "toggle",
                            "value": true
                        }
                    ]
                }
            }
        ],
    "version": "test-version"
}
```
- validate that custom field is removed from templates as well

### Checklist
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

---------

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

## Summary

This PR adds the ability for users to select a template when creating a
case. When a user selects a template the cases form fields are populated
with the values from the template. The solution picker in the flyout
changed as:

<img width="1281" alt="Screenshot 2024-06-20 at 1 26 14 PM"
src="https://github.com/elastic/kibana/assets/7871006/30859c61-94e7-4f0a-97d1-cb081bd72c36">

## Bug fixes

1. Changing the solution through the solution picket in the flyout would
not respect the connector's configuration.
2. Bug where the lazy loading of connectors' icons was causing the
flyout to open and close when you selected a solution picket. This bug
appeared when the first bug was fixed.

## Testing

1. Go to all solutions and create cases setting all fields (including
all fields of all supported connectors) without using templates. Verify
that everything is working as expected.
2. Go to all solutions, create different templates on each solution, and
verify that when creating a case you can use templates and everything is
working as expected.
3. Go to the alerts table of o11y and security and attach alerts to a
new case. Verify that in the flyout the templates are working as
expected.
4. Go to ML and try to attach an ML visualization to a new case. Verify
that the solution picker is working as expected and it resets the form
when changing solutions.

Fixes: #181871
Depends on: #185877

### Checklist

Delete any items that are not applicable to this PR.

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [ ] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed

### For maintainers

- [x] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

---------

Co-authored-by: Janki Salvi <117571355+js-jankisalvi@users.noreply.github.com>
Co-authored-by: adcoelho <antonio.coelho@elastic.co>