Feat: Fixes abandoned PR #2017: Add support for the require_last_push_approval flag in github_branch_protection_v3

[georgekaz]

Resolves #1723 and the bug left in PR #2017

Only the last commit on this is mine, to resolve this problem on a PR created by matthewcostatide

---

Before the change?

The github_branch_protection_v3 resource doesn't support setting the require_last_push_approval flag, and its presence is omitted from the documentation.

After the change?

This PR adds support for the require_last_push_approval flag in the required_pull_request_reviews block of the github_branch_protection_v3 resource type, consistent with the github_branch_protection resource.

Pull request checklist

• [x] Tests for the changes have been added (for bug fixes / features)
• [x] Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• [ ] Yes
• [x] No

---

[aalvarezaph]

Thanks @matthewcostatide !