feat(datastore): add ability to cache repository objects in Redis

See merge request !1084

docs: document new Redis cache settings

See merge request !1083

chore: update Redis key format used for cached repository objects

See merge request !1085

revert: upgrade github.com/jackc/pgx/v4 from v4.13.0 to v4.16.1

See merge request !1087

ci: split gitlab api and online cg tests into different jobs

See merge request !1075

ci: fix tags variable definition

See merge request !1090

ci: add git dependency for release stage

See merge request gitlab-org/container-registry!1082

# [3.52.0](gitlab-org/container-registry@v3.51.1-gitlab...v3.52.0-gitlab) (2022-07-21)

### Features

* **datastore:** add ability to cache repository objects in Redis ([3a0e4931](gitlab-org/container-registry@3a0e4931))

### Reverts

* upgrade github.com/jackc/pgx/v4 from v4.13.0 to v4.16.1 ([6211766f](gitlab-org/container-registry@6211766f))