[release-17.0] update docgen to embed commit ID in autogenerated doc frontmatter (#14056)#14074

ajm188 merged 2 commits intorelease-17.0vitessio/vitess:release-17.0from

backport-14056-to-release-17.0vitessio/vitess:backport-14056-to-release-17.0Copy head branch name to clipboard