fix: allow review requirements check on forks

[erohmensing]

What

[hopefully] fixes an issue where our contribution PRs are not getting auto-requested reviews as we expect: https://github.com/airbytehq/airbyte-internal-issues/issues/9305

How

• Allow running the workflow on forks
• Use GITHUB_TOKEN for this as user forks have access to this token and it has the permissions necessary to perform the check. Implementation suggested here. Follow up note about the get-user-teams-membership action permissions is not relevant to this workflow/action.

User Impact

None

Can this PR be safely reverted and rolled back?

• [x] YES 💚
• [ ] NO ❌