Upgrade to CodeQL v4

[tamirkamara]

Resolves #4749

What is being addressed

CodeQL v3 is on its path to deprecation.

How is this addressed

• Upgrade to CodeQL v4
• Update also the checkout action to v5 (latest)
• Add "actions" language so CodeQL will validate the workflows

[github-actions]

Unit Test Results

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit 9d6bebd.

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[tamirkamara]

/test-force-approve

[github-actions]

🤖 pr-bot 🤖

✅ Marking tests as complete (for commit 9d6bebd)

(in response to this comment from @tamirkamara)

[martinpeck]

LGTM