test: [M3-7783] Add cypress assertion and test for placement group deletion error handling

[AzureLatte]

Description 📝

Add new tests/assertions to check error handling in delete-placement-groups.spec.ts.
Confirm that Cloud Manager gracefully responds if an API error occurs while un-assigning a Linode via the delete modal.
Confirm that Cloud Manager gracefully responds if an API error occurs upon attempt to delete a VM Placement Group.

Changes 🔄

• Add new assertion to check user can retry and continue with deletion when unexpected error happens.
• Add new test to check that user can close and reopen the dialog when unexpected error happens during deletion. (skipped due to M3-8112)
• Add new assertion to check user can retry and continue with unassignment when unexpected error happens.
• Add new test to check that user can close and reopen the dialog when unexpected error happens during unassignment. (skipped due to M3-8112)

How to test 🧪

yarn cy:run -s "cypress/e2e/core/placementGroups/delete-placement-groups.spec.ts"

As an Author I have considered 🤔

Check all that apply

• 👀 Doing a self review
• ❔ Our contribution guidelines
• 🤏 Splitting feature into small PRs
• ➕ Adding a changeset
• 🧪 Providing/Improving test coverage
• 🔐 Removing all sensitive information from the code and PR description
• 🚩 Using a feature flag to protect the release
• 👣 Providing comprehensive reproduction steps
• 📑 Providing or updating our documentation
• 🕛 Scheduling a pair reviewing session
• 📱 Providing mobile support
• ♿ Providing accessibility support

[jaalah-akamai]

✅

[github-actions]

Coverage Report: ✅
Base Coverage: 81.62%
Current Coverage: 81.62%

[abailly-akamai]

@AzureLatte you will need to rebase this PR with the latest develop. All tests are failing now because of a bad merge that ended up in develop.

[AzureLatte]

@AzureLatte you will need to rebase this PR with the latest develop. All tests are failing now because of a bad merge that ended up in develop.

Just updated. Could you please retry? Thank you!

[abailly-akamai]

@AzureLatte #10486 was merged!

you should be able to remove this skip in this PR now

[jdamore-linode]

Nice work @AzureLatte, tests look great and bonus points for catching that dialog reset issue too!

Also confirmed that pulling in the latest changes from develop allows those skipped tests to pass 👍 approved pending the latest from develop getting merged in and those tests being unskipped!

[abailly-akamai]

Looks great, thanks for the coverage and reporting that bug! 🚢