[NVPTX][Tests-only] Update TMA intrinsic tests (#147364)
The TMA intrinsic tests use undef for the
multicast/cache_hint operands when their
corresponding flags are 0. (i.e. when they
are ignored by the backend while lowering).
These need not be undef and hence this
patch migrates the remaining tests to
use values instead.
Signed-off-by: Durgadoss R <durgadossr@nvidia.com>
