1.Remove clock functions from some tests that don't need them.
2.In some memory pool tests and coherency tests, timer-based kernel
delay isn't reliable, use pinned host based notification instead.
3.Add CHECK_PCIE_ATOMICS_SUPPORT before some tests.
4.catch/unit/memory/hipMemoryAllocateCoherent.cc is removed
as it is useless and originally excluded in building.
5.Some tests can still pass even if clock rate =0, thus they
will be kept as is.
6.Some logic and format improvement in some tests.
Change-Id: I6b3c6bf54c61cffd45cd6f17c75998f751b75725
[ROCm/hip-tests commit: ec8ff45a1d]
Unit_hipMemPoolApi_BasicAlloc expects to work on device 0, but other
tests will set not-0 devices in mgpu. This leads to hang of
Unit_hipMemPoolApi_BasicAlloc. Fix by set device 0 in head code
of Unit_hipMemPoolApi_BasicAlloc.
SWDEV-508872 - Fix Perf_hipPerfMemFill_test
When mem size is 2G, the test is so slow that it looks like stuckness.
Set top mem size to 1G can make the test pass in an acceptiable time.
Change-Id: Ie26dbf597e5ba8cb898d1aae5ed5ecf0267c3228
[ROCm/hip-tests commit: 94eea4db59]