Merge branch '384955-remove-reindexing-records-when-reindexing-from-scratch' into 'master'

Clear reindexing records when initating indexing

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/170504



Merged-by: Michał Zając <mzajac@gitlab.com>
Approved-by: Madelein van Niekerk <mvanniekerk@gitlab.com>
Approved-by: Suraj Tripathi <stripathi@gitlab.com>
Approved-by: Arturo Herrero <arturo.herrero@gmail.com>
Approved-by: Michał Zając <mzajac@gitlab.com>
Reviewed-by: Madelein van Niekerk <mvanniekerk@gitlab.com>
Co-authored-by: Terri Chu <tchu@gitlab.com>