.github: remove CODEOWNERS

[tisonkun]

Signed-off-by: tison wander4096@gmail.com

What problem does this PR solve?

Issue Number: close #25077

CODEOWNERS does not well fit our codebase and actual owners mapping. Thus, I plan to create another PR to remove the CODEOWNERS.

Release note

• No release note

[tisonkun]

/cc @guo-shaoge @bb7133

[tisonkun]

/run-all-tests

[ti-chi-bot]

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• guo-shaoge

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[bb7133]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 47538b7

[ti-chi-bot]

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/run-all-tests

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