executor: fix the missing Grantor when querying mysql.tables_priv (#38461)

[ti-chi-bot]

This is an automated cherry-pick of #38461

What problem does this PR solve?

Issue Number: close #38293

Problem Summary:

When executing grant, we create an internal session to start internal transaction, but does not pass the user in.

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

Fix a bug about missing `grantor` in `mysql.tables_priv`.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• CbcWestwolf
• xhebox

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[CbcWestwolf]

/label status/can-merge

[xhebox]

/merge

[ti-chi-bot]

@CbcWestwolf: The label(s) status/can-merge cannot be applied. These labels are supported: challenge-program, compatibility-breaker, first-time-contributor, contribution, require-LGT3, good first issue, correctness, duplicate, proposal, security, needs-more-info, needs-cherry-pick-release-4.0, needs-cherry-pick-release-5.0, needs-cherry-pick-release-5.1, needs-cherry-pick-release-5.2, needs-cherry-pick-release-5.3, needs-cherry-pick-release-5.4, needs-cherry-pick-release-6.0, needs-cherry-pick-release-6.1, needs-cherry-pick-release-6.2, needs-cherry-pick-release-6.3, affects-4.0, affects-5.0, affects-5.1, affects-5.2, affects-5.3, affects-5.4, affects-6.0, affects-6.1, affects-6.2, affects-6.3, may-affects-4.0, may-affects-5.0, may-affects-5.1, may-affects-5.2, may-affects-5.3, may-affects-5.4, may-affects-6.0, may-affects-6.1, may-affects-6.2, may-affects-6.3.

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[ti-chi-bot]

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

Commit hash: 196784c

[ti-chi-bot]

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