Merge branch 'gitaly-version-v1.47.0' into 'master'

Upgrade Gitaly to v1.47.0

See merge request gitlab-org/gitlab-ce!29789

(cherry picked from commit 1de4ebc7)

7144f715 Update Gitaly version to v1.47.0
3efb1520 Add changelog entry

GITALY_SERVER_VERSION

-1.46.0
+1.47.0

changelogs/unreleased/gitaly-version-v1.47.0.yml

+---
+title: Upgrade to Gitaly v1.47.0
+merge_request: 29789
+author:
+type: changed