The used UAV formats are explicitly added in the [require] section of
every test that uses them.
Some of these tests were failing on Intel UHD graphics 770 because of
missing support for additional UAV load types, explicitly requiring
these formats allows these tests to be skipped.
Tangled instructions, like wave operations, are sensitive to how the
invocations in a wave reconverge after having diverged. Here we test
for some of those scenarios.
