Migrates auth .gitea/workflows/ci.yml deploy-dev and deploy-uat
jobs from direct 'git push origin main' to cartsnitch/infra to the
CAR-1195 PR-bump pattern. Brings auth in line with cartsnitch/cartsnitch
and stops the red deploy-dev/deploy-uat jobs on main pushes.
Also fixes the registry-login password to use REGISTRY_TOKEN (CAR-1009
standard) instead of GITEA_TOKEN — uat already had this fix (CAR-1237);
main was lagging.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
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