chore: bump zoekt image to v1.11.1 and chart version to 3.8.3

What does this MR do and why?

• multiple fixes to failing CI jobs
• remove pin to ruby 3.3.10 from Gemfile
• Bumps the gitlab-zoekt image tag from v1.11.0 to v1.11.1 and chart version from 3.8.2 to 3.8.3.
  • v1.11.1 is a backport of gitlab-org/gitlab-zoekt-indexer!852 which fixes a bug where the Zoekt indexer incorrectly performs an incremental index after a force push, resulting in stale or missing search results.

References

• Original issue: gitlab-org/gitlab#593947 (closed)
• Original MR: gitlab-org/gitlab-zoekt-indexer!852 (merged)
• This version has been deployed and tested in staging and production (1.1.13, but it does include the fixes)

Backport chain for 18.10 (SM)

1. ✅ gitlab-zoekt-indexer — cherry-picked fix onto v1.11.0, tagged v1.11.1
2. ✅ gitlab-org/build/CNG — gitlab-org/build/CNG!2888 (merged), builds cng/gitlab-zoekt:v1.11.1 on 18-10-stable
3. ⏳ gitlab-org/gitlab — gitlab-org/gitlab!229886 (merged) on 18-10-stable-ee bumping GITLAB_ZOEKT_VERSION to v1.11.1
4. ⏳ cloud-native/charts/gitlab-zoekt - ⭐ This MR - bump chart to 3.8.3 with image v1.11.1
5. ⏳ gitlab-org/charts/gitlab — MR on 9-10-stable bumping gitlab-zoekt to 3.8.3