Makefile, testkit: don't add intest tag for daily bench

[YangKeao]

What problem does this PR solve?

Issue Number: close #52403

Problem Summary:

The benchmark gets slower with the assertion. If we disable the intest tag, the performance will be back but the TestKit will fail to initialize.

What changed and how does it work?

This PR only checks the intest tag in testkit when the incoming t is not *testing.B.

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.

go test -benchmem -run=^$ -bench ^BenchmarkUnionScanRead$ github.com/pingcap/tidb/pkg/executor

Run this command without -tags intest, it'll execute successfully.

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

None

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Defined2014, hawkingrei

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• OWNERS [Defined2014,hawkingrei]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-08 06:56:03.736171123 +0000 UTC m=+859025.263711661: ☑️ agreed by hawkingrei.
• 2024-04-08 07:02:12.999511757 +0000 UTC m=+859394.527052303: ☑️ agreed by Defined2014.

[codecov]

Codecov Report

Merging #52404 (f231368) into master (fdcecc4) will increase coverage by 1.2917%.
Report is 42 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #52404        +/-   ##
================================================
+ Coverage   71.1889%   72.4806%   +1.2917%     
================================================
  Files          1468       1468                
  Lines        432247     439000      +6753     
================================================
+ Hits         307712     318190     +10478     
+ Misses       105335     100797      -4538     
- Partials      19200      20013       +813     

Flag	Coverage Δ
integration	28.1333% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	41.6008% <ø> (+7.5023%)	⬆️