Update core-lib-gcp to use universal auth token requester, refactor mappers configuration(GONRG-4058)

Description:

Update core lib GCP, to use universal auth token requester. Refactor mappers configuration. Updated Readme.md

Changes include:

• Refactor (a non-breaking change that improves code maintainability).
• Bugfix (a non-breaking change that solves an issue).
• New feature (a non-breaking change that adds functionality).
• Breaking change (a change that is not backward-compatible and/or changes current functionality).

Changes in:

• GCP
• Azure
• AWS
• IBM

Dev Checklist:

• Added Unit Tests, wherever applicable.
• Updated the Readme, if applicable.
• Existing Tests pass
• Verified functionality locally
• Self Reviewed my code for formatting and complex business logic.

devops/gcp/configmap/templates/legal-variables.yml

@@ -13,3 +13,4 @@ data:
   PROJECT_ID: "{{ .Values.data.project_id }}"
   GOOGLE_AUDIENCES: "{{ .Values.data.google_audiences }}"
   ACCEPT_HTTP: "{{ .Values.data.accept_http }}"
+  SPRING_PROFILES_ACTIVE: "{{ .Values.data.spring_profiles_active }}"