Update CI to not deploy directly to production on release branches

[MDrakos]

CP-1073 State Tool does not directly deploy to production

[Naatan]

Looks good to me! One minor thing.

[MDrakos]

Manually tested promoter script with the latest changes and it worked as expected:

~/work/cli/scripts/ci/s3-promoter CP-1073* ❯ go run main.go us-east-1 state-tool update/state                                                                                                                                                     10:51:26
Promoting staging files to production in bucket: state-tool
Using base prefix: update/state/
Found 2 staging files to promote:
  - update/state/staging/dummy.txt
Promoting update/state/staging/ -> update/state/release/
Promoting update/state/staging/dummy.txt -> update/state/release/dummy.txt
Successfully promoted 2 files from staging to production.