[CIR][NFC] Mark invalid-linkage.cir as XFAIL (#188279)
The invalid-linkage.cir test is currently failing as a result of a
recent change to the MLIR attribute parser. I am temporarily marking
this test as XFAIL while that problem is being worked on to unblock CIR
development. I added a check that will force the test to fail even after
the problem is fixed so that we don't start getting unexpected passes
when the fix is merged. (CIR testing isn't run during CI for MLIR
changes.) I will reenable the test after the problem has been fixed.
