[Epic]: Stop using teamcity

[jamesgorrie]

At the end of this Q2 the DevX team have a desire to turn off TeamCity, in favour of using GitHub Actions.

List of repos that we should migrate: https://docs.google.com/spreadsheets/d/1DWplX1Qe0ivcFxYBmWHqZdi1IPHNNlhFNWTS5UjnVJ4/edit#gid=0

Migrate the following builds to GitHub Actions

Beta Give feedback

1. Move frontend build to GitHub Actions frontend#26045
   Health Small(ish) rota ticket +2
   
2. Migrate DCR to GH Actions #8647
   +0
   
3. Migrate backup-parameter-store to GitHub Actions frontend-lambda#47
   +0
   
4. Migrate skimlinks-lambda to GH Actions skimlinks-lambda#8
   +0
   
5. https://github.com/guardian/platform/issues/1547
6. https://github.com/guardian/fastly-edge-cache/issues/1009
7. Migrate AR to GHA #8676
   Health +1
   
8. https://github.com/guardian/fastly-image-service/issues/76

[ioannakok]

Closing as completed