Task: Finish [SuppressTempFileChecks] attribute functionality

[NightOwl888]

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Task description

This attribute exists in LuceneTestCase, but does not currently function. The task involves researching what the original attribute did in Lucene and finding a way to make it function.

Note that most of the other attributes we have ported are called automatically by NUnit because we implement IApplyToTest, IApplyToContext and IWrapTestMethod, as appropriate.

We also keep these tests nested within LuceneTestCase because these attributes don't function outside the context of LuceneTestCase anyway.