br: use the RestrictedSQLExecutor to exec the internal SQL.

[winoros]

What problem does this PR solve?

Issue Number: to #29749

Problem Summary:

When we are using the SQL use trigger the br. It would store the current session for its own usage.
If we use its ExecuteInternal to execute the SQL. The session will execute two statement at the same time, this would cause bug.

What is changed and how it works?

Check List

Tests

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

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• tiancaiamao

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[winoros]

/run-integration-br-test

[ti-chi-bot]

@winoros: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-br-integration-test	73d71c2	link	true	/test pull-br-integration-test

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[ti-chi-bot]

@winoros: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-br-integration-test	73d71c2	link	true	/test pull-br-integration-test

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.