executor: only use snapshot getter when point/batch point executor is running

[you06]

What problem does this PR solve?

Issue Number: close #56178 ref #58289, #56178
Ref client-go PR: tikv/client-go#1479

Problem Summary:

What changed and how does it work?

Check List

Tests

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

  • I checked and no code files have been changed.

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.

None

[ti-chi-bot]

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Tests

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[ti-chi-bot]

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[tiprow]

Hi @you06. Thanks for your PR.

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[ti-chi-bot]

@you06: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/check_dev_2	54b5cbb	link	true	/test check-dev2
pull-integration-e2e-test	54b5cbb	link	true	/test pull-integration-e2e-test
idc-jenkins-ci-tidb/unit-test	54b5cbb	link	true	/test unit-test

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[you06]

Move to #59219