[2151] GitHub actions OIDC

[saliceti]

Context

Deploy to AKS using Github actions and OIDC instead of a service principal secret

Depends on:

• [2151] Enable Github actions OIDC for services teacher-services-cloud#335
• [2151] Update kubelogin makefile commands for OIDC teacher-services-cloud#337
• [2151] Update all actions for OIDC github-actions#106
• [2151] Allow github actions OIDC authentication to AKS clusters terraform-modules#140
• [2151] Simplify kubelogin arguments terraform-modules#141

Changes proposed in this pull request

• Change workflows to avoid using azure credentials
• Add dv_review and pt_review environments
• Delete enable/disable maintenance page (replaced)

Guidance to review

The branch tmp-tf-modules-no-oidc uses the updated terraform modules and github actions but keeps using service principal secret authentication (SPN). It is useful for testing the new code doesn't break existing services.

Successful runs:

• Build and deploy - OIDC: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12596395333
• Delete review app - OIDC: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12600918155/job/35120949419
• Manual deployment - OIDC: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12597647276
• Manual deployment - SPN: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12600379778
• Manual deployment on platform-test - OIDC: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12601579353/job/35124034120
• Backup DB - OIDC: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12586312670
• Back up DB - SPN: https://github.com/DFE-Digital/itt-mentor-services/actions/workflows/database-backup.yml
• Restore DB - OIDC: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12596163196
• Restore DB - SPN: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12600813732
• Maintenance - OIDC: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12581213924
• Maintenance - SPN: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12601050536
• Postgres PTR - OIDC: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12596330536
• Postgtres PTR - SPN: https://github.com/DFE-Digital/itt-mentor-services/actions/runs/12601265357

Link to Trello card

https://trello.com/c/F9hmE3if

[github-actions]

Deployments

App	URL
Track & Pay	https://track-and-pay-1281.test.teacherservices.cloud
School Placements	https://manage-school-placements-1281.test.teacherservices.cloud