[DNM] test cop fast path with non sender cop

[you06]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
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  • 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

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None

[ti-chi-bot]

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[tiprow]

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[you06]

test sysbench point select with cop path

concurrency	before	this pr	diff
100	136625	138291	+1.2%
150	140388	142664	+1.6%
200	142721	144933	+1.5%