Cherry-pick all pending PRs into `release-17.0`#13364

Merged

mattlord merged 7 commits intovitessio:release-17.0from

planetscale:cherry-pick-backport-on-release-17.0

Jun 23, 2023

Commits on Jun 23, 2023

Set the number of threads for release notes generation with a flag (#13273)
frouioui
committed
mysqlctl: Correctly encode database and table names (#13312)

dbussink
authored and
frouioui
committed
Bug fix: SQL queries erroring with message `unknown aggregation random` (#13330)

arvind-murty
authored and
frouioui
committed
bugfixes: collection of fixes to bugs found while fuzzing (#13332)

systay
authored and
frouioui
committed
bug: don't always wrap aggregation in coalesce (#13348)

systay
authored and
frouioui
committed
update link for reparenting guide (#13350)

Andrew Mason
authored and
frouioui
committed
Add RestorePosition and RestoredBackupTime as metrics to vttablet (#13339)

authored and
frouioui
committed