lightning: fix grep check in integration test

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #43820

Problem Summary:

What is changed and how it works?

              -e      Exit immediately if a pipeline (which may consist of a single simple command), a list, or a compound command (see SHELL GRAMMAR above), exits with a non-zero status.  The shell
                      does not exit if the command that fails is part of the command list immediately following a while or until keyword, part of the test following the if or elif reserved words, part
                      of any command executed in a && or || list except the command following the final && or ||, any command in a pipeline but the last, or if the command's return value is being
                      inverted with !.

The shell does not exit if ...... the command's return value is being inverted with !

that means check not contains by ! grep directly will not work

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.

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• gozssky
• lance6716

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[D3Hunter]

/run-integration-br-test

[D3Hunter]

ci pass
https://ci.pingcap.net/blue/organizations/jenkins/tidb_ghpr_integration_br_test/detail/tidb_ghpr_integration_br_test/12572/pipeline

[D3Hunter]

/merge

[ti-chi-bot]

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

Commit hash: 0e99477

[hawkingrei]

/merge