Wait for app in DELETING state before create

[varundeepsaini]

Changes

Fixes: #4006

Wait for app in DELETING state before creating a new app. When a DAB app is destroyed and immediately redeployed, the create fails with "An app with the same name already exists" because the app is still in DELETING state. This change adds a wait before create to handle this race condition.

I couldn't replicate the issue locally but have added unit tests to verify the behavior.

Tests

• make test run locally
• relevant change in docs/ folder
• covered with integration tests in internal/acceptance
• using Go SDK
• using TF Plugin Framework
• has entry in NEXT_CHANGELOG.md file

[varundeepsaini]

@alexott have made the changes. Please review again
@andrewnester can you also take a look

[varundeepsaini]

@andrewnester bump ^^

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• PR number: 5263
• Commit SHA: 10b6e91d2b3e7853b721b75d6ee7eaaf22c03657

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