- Update container image names to ci-sizer-{receiver,collector}
- Update Dex OIDC client ID and name to ci-sizer
- Template allowed-org as SIZER_ALLOWED_ORG variable
Register forgejo-runner-sizer as a Dex static client for OIDC
authentication on sizer.dev.t09.de. Adds the client secret env var
injection and the staticClients entry with secretEnv reference.