[hashicorp_vault] Fix fields.yml definition for dynamic mapping

[andrewkroh]

What does this PR do?

Earlier versions of Fleet did not handle dynamic mappings correctly so hashicorp_vault explicitly specified the mappings through the manifest. This is no longer needed for 8.x. Fixes #7811

Also refer to the ECS definition for all fields that exist in ECS.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

Related issues

• Relates [hashicorp_vault] Convert dynamic mappings to fields.yml #7811
• Depends on: [ECS] Updating hashicorp_vault to ECS 8.10 & ECS field validation updates #7960 (to make pipeline tests pass, otherwise unrelated to these changes)

Mappings

This is how the mappings changed.

2d1
<   "dynamic": true,
5c4
<       "all_values": {
---
>       "hashicorp_vault.metrics.*.value": {
8a8
>         "match_mapping_type": "*",
13c13
<       "all_counters": {
---
>       "hashicorp_vault.metrics.*.counter": {
16a17
>         "match_mapping_type": "*",
21c22
<       "all_rates": {
---
>       "hashicorp_vault.metrics.*.rate": {
24a26
>         "match_mapping_type": "*",
29c31
<       "all_histograms": {
---
>       "hashicorp_vault.metrics.*.histogram": {
32a35
>         "match_mapping_type": "*",
79,94d81
<         }
<       }
<     },
<     "hashicorp_vault": {
<       "properties": {
<         "metrics": {
<           "properties": {
<             "*": {
<               "properties": {
<                 "*": {
<                   "dynamic": true,
<                   "type": "object"
<                 }
<               }
<             }
<           }

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• Start Time: 2023-09-27T14:37:45.617+0000

• Duration: 20 min 56 sec

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Passed	18
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Total	18

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (2/2)	💚
Files	100.0% (3/3)	💚 13.636
Classes	100.0% (3/3)	💚 13.636
Methods	92.593% (25/27)	👍 9.259
Lines	87.678% (185/211)	👍 2.657
Conditionals	100.0% (0/0)	💚

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Package hashicorp_vault - 1.16.1 containing this change is available at https://epr.elastic.co/search?package=hashicorp_vault

[elasticmachine]

Package hashicorp_vault - 1.16.1 containing this change is available at https://epr.elastic.co/search?package=hashicorp_vault