terraform test: override prevent_destroy meta attribute

[liamcervante]

This PR allows terraform test to override the prevent_destroy attributes during it's cleanup operations. Terraform test should always clean up any infrastructure it has created, and is basically unusable as long as prevent_destroy is set to true. We shouldn't ask users to update their configs to make the testing framework work.

Fixes #34960

Target Release

1.14.x

Rollback Plan

• If a change needs to be reverted, we will roll out an update to the code within 7 days.

Changes to Security Controls

Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.

CHANGELOG entry

• This change is user-facing and I added a changelog entry.
• This change is not user-facing.

[dsa0x]

This however prevents users from being able to test a module, where they also want to see the destroy prevented like in the real module.

[liamcervante]

where they also want to see the destroy prevented like in the real module.

This is already impossible to test. Currently, the test will fail with an error during the cleanup stage if the prevent_destroy attribute is set to true, always leaving behind the resource in the underlying provider with no state file to help clean things up. I'm not sure how valuable is to let users test that anyway. If prevent_destroy is set to true in the configuration, then they can trust that Terraform will prevent that resource being destroyed during normal operations. Writing a test for it would basically be like expecting users to write their own tests to validate Terraform's underlying behaviour which shouldn't be needed.

[dsa0x]

Some conflicts need to be resolved.

[github-actions]

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