Track enable XslCompiledTransform Date/Time XSL test

[tarekgh]

The PR #115415 added support for the Azure Linux image in CI. This image sets the default locale to POSIX, which .NET interprets as the Invariant culture. As a result, one of the XslCompiledTransform tests—specifically one that verifies date and time formatting in XSLT—fails because it doesn't handle culture-invariant scenarios correctly.

Relevant test line:

runtime/src/libraries/System.Private.Xml/tests/Xslt/XslCompiledTransformApi/XslCompiledTransform.cs

Line 3168 in 2c94e69

[InlineData("bug93189.xsl", "bug93189.xml", "bug93189.xml", "NullResolver", true, "XmlReader")]

To unblock the PR, we’ve temporarily disabled the test. This issue is now tracking the work to re-enable it after updating the test to be culture-agnostic. To do so, the test logic updated accordingly. It will be good consider #93189 when doing so.

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[tarekgh]

#93189