Use github-native CODEOWNERS

[janniklasrose]

Changes

1. Remove the maintainer-approval workflow
2. Consolidate .github/OWNERS & .github/OWNERTEAMS into .github/CODEOWNERS
3. To model "CLI maintainers can approve everything", include that team at the start of every entry
4. Linter to make sure 3. is always true

Why

maintainer-approval check run has shown to be unreliable (requiring rebase despite getting sufficient approvals)

Tests

GitHub does not have a CODEOWNERS playground :-(

[janniklasrose]

File equivalent to old OWNERS but team: replaced with @databricks/.

Created:

• databricks/eng-deco-cli
• databricks/eng-deco-dabs
• databricks/eng-deco-ax
• databricks/eng-deco-platform

[eng-dev-ecosystem-bot]

Integration test report

Commit: 907bc8f

Run: 35106323877

	Env	🔄​flaky	💚​RECOVERED	✅​pass	🙈​skip	Time
💚​	aws linux		1	275	15	8:31
💚​	aws windows		1	277	13	6:53
🔄​	azure linux	1	1	273	15	10:02
🔄​	azure windows	1	1	275	13	10:13
💚​	gcp linux		1	275	15	10:00
🔄​	gcp windows	1	1	276	13	8:55

	Test Name	aws linux	aws windows	azure linux	azure windows	gcp linux	gcp windows
💚​	TestAccept	💚​R	💚​R	💚​R	💚​R	💚​R	💚​R
🔄​	TestSyncFullFileSync	✅​p	✅​p	✅​p	🔄​f	✅​p	🔄​f
🔄​	TestSyncIncrementalFileSync	✅​p	✅​p	🔄​f	✅​p	✅​p	✅​p

Top 8 slowest tests (at least 2 minutes):

duration	env	testname
3:34	azure windows	TestFilerWorkspaceFilesExtensionsReadDir
3:20	aws windows	TestAccept
3:17	gcp windows	TestAccept
3:12	azure windows	TestAccept
2:33	gcp windows	TestFilerWorkspaceFilesExtensionsReadDir
2:07	azure windows	TestFilerWorkspaceFilesExtensionsDelete
2:03	aws windows	TestFilerRecursiveDelete/workspace_files
2:00	gcp linux	TestImportDirWithOverwriteFlag

[github-actions]

Waiting for approval

Based on git history, these people are best suited to review:

• @simonfaltum -- recent work in .github/workflows/, .github/, .github/scripts/
• @pietern -- recent work in ./, tools/, .github/
• @denik -- recent work in ./, tools/, .github/workflows/

Eligible reviewers: @andrewnester, @anton-107, @lennartkats-db, @rclarey, @renaudhartert-db, @rugpanov, @shreyas-goenka

_{Suggestions based on git history. See OWNERS for ownership rules.}