[chore] Fix SqlServerScraper test on Windows (open-telemetry#38852)

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#### Description
We removed 2 warnings in open-telemetry#38831 , and this PR updates corresponding test
on Windows.

cc @atoulme @crobert-1 
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#### Link to tracking issue
Fixes open-telemetry#38842 

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#### Testing
Updated

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#### Documentation
n/a

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Author: sincejune

receiver/sqlserverreceiver/scraper_windows_test.go

@@ -91,7 +91,7 @@ func TestSqlServerScraper(t *testing.T) {
 
 	assert.NoError(t, s.start(context.Background(), nil))
 	assert.Empty(t, s.watcherRecorders)
-	assert.Equal(t, 23, obsLogs.Len())
+	assert.Equal(t, 21, obsLogs.Len())
 	assert.Equal(t, 21, obsLogs.FilterMessageSnippet("failed to create perf counter with path \\SQLServer:").Len())
 	assert.Equal(t, 21, obsLogs.FilterMessageSnippet("The specified object was not found on the computer.").Len())
 	assert.Equal(t, 1, obsLogs.FilterMessageSnippet("\\SQLServer:General Statistics\\").Len())