Bump Gitlab Shell to 14.29.0

- Update module google.golang.org/grpc to v1.58.2
- Update dependency gitlab-dangerfiles to v4
- Optimize Ruby and Go job caching
- Update module gitlab.com/gitlab-org/gitaly/v16 to v16.4.0
- Update module github.com/prometheus/client_golang to v1.17.0
- Update module gitlab.com/gitlab-org/gitaly/v16 to v16.4.1
- Update dependency gitlab-dangerfiles to '~> 4.1.0'
- Always return stdin/stdout errors
- Update module golang.org/x/sync to v0.4.0
- Update dependency golang to v1.21.2
- Removes module github.com/grpc-ecosystem/go-grpc-middleware
- Update module github.com/otiai10/copy to v1.14.0
- Update module golang.org/x/crypto to v0.14.0
- Allow only git commands for auth via SSH certs
- Send ssh_certificates as protocol
- Update module google.golang.org/grpc to v1.58.3

Changelog: other

GITLAB_SHELL_VERSION

-14.28.0
+14.29.0