feat: ability to ignore/exclude outside collaborators from CODEOWNERS removal

[jmeridth]

Organizations have outside collaborators that have been given permissions to interact with its repositories.

Currently they will get flagged as non-organization members and a PR will be created to remove them from the CODEOWNERS file currently.

Unfortunately, the github3 library we use has not implemented the ability to detect outside collaborators in an organization. There is an existing issue on the library.

[jmeridth]

I'm going to take a stab at the external library PR and then can go after this.

[github-actions]

This issue is stale because it has been open 21 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[jmeridth]

not stale

[github-actions]

This issue is stale because it has been open 21 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[github-actions]

This issue was closed because it has been stalled for 35 days with no activity.