infoschema: avoid strings.toUpper in the IsClusterTableByName

[hawkingrei]

What problem does this PR solve?

Issue Number: close #59606

Problem Summary:

What changed and how does it work?

in fact, They have been upper.

memTableToAllTiDBClusterTables and memTableToDDLOwnerClusterTables have been upper. the parameters of IsClusterTableByName have been upper, too.

Check List

Tests

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

func BenchmarkIsClusterTableByName(b *testing.B) {
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		infoschema.IsClusterTableByName("test", "t1")
	}
}

before

BenchmarkIsClusterTableByName
BenchmarkIsClusterTableByName-8   	55993436	        20.92 ns/op

after

BenchmarkIsClusterTableByName
BenchmarkIsClusterTableByName-8   	895389862	         1.412 ns/op

• 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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.7753%. Comparing base (8059751) to head (928c951).
Report is 15 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59608        +/-   ##
================================================
+ Coverage   73.0128%   74.7753%   +1.7625%     
================================================
  Files          1694       1740        +46     
  Lines        468330     480808     +12478     
================================================
+ Hits         341941     359526     +17585     
+ Misses       105359      98660      -6699     
- Partials      21030      22622      +1592     

Flag	Coverage Δ
integration	48.9778% <100.0000%> (?)
unit	72.1922% <100.0000%> (-0.0228%)	⬇️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	60.8023% <ø> (+15.5796%)	⬆️

[hawkingrei]

/retest

[hawkingrei]

/retest

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-02-18 08:47:34.320133233 +0000 UTC m=+951096.716355294: ☑️ agreed by Defined2014.
• 2025-02-19 06:32:44.139430343 +0000 UTC m=+1029406.535652404: ☑️ agreed by tangenta.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Defined2014, tangenta, winoros

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• pkg/infoschema/OWNERS [tangenta]
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