Refactor KmTest::FtRtlExpression tests.

I've rewritten the testsuite so we can use just a Struct to feed FsRtlIsName and FsRtlIsDbcs with it.
This makes much more sane and easy to add new testcases.

I could reuse the same "for" loop for both tests in a really easy way, but I didn't in the sake of readibility, Imho i think is better if we have:
FsRtlIsNameInExpressionTest();
FsRtlIsDbcsInExpressionTest();

Than if we have:
FsRtlIsTest();

Also, we can find (who knows) exceptional cases where both APIs works different with same parameters(wildcards are wild and comes from oldie times).

I've added extra-Debug info by showing how the API was called to know which test has failed.
And I've added a couple of new tests, and removed a duplicated one.