GCP implement index cleanup (GONRG-856)

Type of change

• Bug Fix
• Feature

Please provide link to gitlab issue or ADR(Architecture Decision Record)
#5 (comment 16693)

Does this introduce a change in the core logic?

• [No]

Does this introduce new features/functionality in core logic?

• [YES]

Does this introduce a breaking change?

• [NO]

Does this introduce a change in the cloud provider implementation, if so which cloud?

• AWS
• Azure
• GCP
• IBM

What is the current behavior?

GCP provider don't clean schema indexes when schema deletes.

What is the new/expected behavior?

GCP provider clean schema indexes when schema deletes.

Have you added/updated Unit Tests and Integration Tests?

• [YES]

Any other useful information

Changes:

• Add new controller CleanupIndiciesApi
• Add new test class CleanupIndiciesApiTest