Merge main into v1

[github-actions]

Merging 83d5f38 into v1

Conductor for this PR is @adityasharad

Contains the following pull requests:

• Mergeback v1.0.13 refs/heads/v1 into main #730 - Mergeback v1.0.13 refs/heads/v1 into main (@edoardopirovano)
• Refactor PR checks #732 - Refactor PR checks (@edoardopirovano)
• Update CodeQL bundle to 20210907 / 2.6.1 #733 - Update CodeQL bundle to 20210907 / 2.6.1 (@adityasharad)

Please review the following:

• The CHANGELOG displays the correct version and date.
• The CHANGELOG includes all relevant, user-facing changes since the last release.
• There are no unexpected commits being merged into the v1 branch.
• The docs team is aware of any documentation changes that need to be released.
• The mergeback PR is merged back into main after this PR is merged.

[edoardopirovano]

Triggered mainly to check the refactored PR checks and branch protection rules work on v1 but may as well go ahead with this to get the Action using 2.6.1.

[edoardopirovano]

LGTM. Note 2.6.1 bundled a broken DB upgrade script but this is not a concern here since the Action only works on freshly created DBs.