Migrate gcp wif

[neillturner]

Context

Migrate application to use gcp wif

Changes proposed in this pull request

Adding identity federation for google cloud authentication and big query

Guidance to review

review changes.

access review app

check events flowing to GCP

Link to Trello card

Claims: migrate to GCP WIF

Checklist

• Attach to Trello card
• Rebased main
• Cleaned commit history
• Tested by running locally

[github-actions]

Deployments

Journey	URL
Additional Payments	https://claim-additional-payments-for-teaching-review-3481-web.test.teacherservices.cloud/additional-payments/claim
Student Loans	https://claim-additional-payments-for-teaching-review-3481-web.test.teacherservices.cloud/student-loans/claim
Further Education	https://claim-additional-payments-for-teaching-review-3481-web.test.teacherservices.cloud/further-education-payments/landing-page
Early Years Payment	https://claim-additional-payments-for-teaching-review-3481-web.test.teacherservices.cloud/early-years-payment/landing-page
Relocation Payments	https://claim-additional-payments-for-teaching-review-3481-web.test.teacherservices.cloud/get-a-teacher-relocation-payment/landing-page
Admin	https://claim-additional-payments-for-teaching-review-3481-web.test.teacherservices.cloud/admin

[vipin-dfe]

lgtm.