GCP implement index cleanup (GONRG-856)

Type of change

• Bug Fix
• Feature

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

Does this introduce a change in the core logic?

• [YES]

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

• AWS
• Azure
• GCP
• IBM

Does this introduce a breaking change?

• [NO]

What is the current behavior?

GCP provider don't send information in indexer-service about schema deletes.

What is the new/expected behavior?

GCP provider send information in indexer-service about schema deletes

Have you added/updated Unit Tests and Integration Tests?

• [NO]

Any other useful information

Changes:

• Add publish message in SchemaServiceImpl class, when schema deletes