[MLIR][NVVM][Tests]: Update FileCheck primitives (#173252)
This patch updates a few FileCheck primitives for the TMA test
to use CHECK-PTX-DAG instead of CHECK-PTX to accommodate
a slightly different ordering of BB's.
The dump-ptx integration test fails when the PTX is generated
through nvcc (intermediates) from public toolkit. This patch fixes
it by allowing regex strings from both the backends.
Signed-off-by: Durgadoss R <durgadossr@nvidia.com>
