Bump gitlab-zoekt to 0.5.5

This MR includes changes from 2 CNG image version bumps:

• Add shard deletion (gitlab-org/gitlab-zoekt-indexer!9 - merged)
• Fix module path (gitlab-org/gitlab-zoekt-indexer!10 - merged)
• Set FromHash from zoektSHA for indexing (gitlab-org/gitlab-zoekt-indexer!12 - merged)
• Small refactor of status api endpoint (gitlab-org/gitlab-zoekt-indexer!13 - merged)
• Clean up *.tmp files (gitlab-org/gitlab-zoekt-indexer!15 - merged)