[TESTS][gfx90a] Enable more tests for gfx90a (#1242)
[TESTS][gfx90a] Enable more tests for gfx90a (#1242)

* fix-issue-1187(01) MIOPEN_TEST_GFX90a -> MIOPEN_TEST_GFX90A https://github.com/ROCmSoftwarePlatform/MIOpen/pull/1098/files#r737426439

* [ci-skip] fix-issue-1187(03) Enabled the same set of tests for gfx90a as we already have for gfx908

* fix-issue-1187(06) Disable gfx90a testing for ConvAsmImplicitGemmGTCDynamic*Xdlops tests.

* fix-issue-1187(07) Let's better disable ConvAsmImplicitGemmGTCDynamic*Xdlops explicitly

* fix-issue-1187(08) Enable custom tests for gfx90a by default. Remove useless GFX908_ENABLED. Disable test_conv_embed_db for all targets except VEGA.

* Added WORKAROUND_ISSUE_1187 (cmake option)

* Narrow WORKAROUND_ISSUE_1187 to FP32 only
ROCmSoftwarePlatform/MIOpen,ROCmSoftwarePlatform/MIOpen,ROCmSoftwarePlatform/MIOpen,ROCmSoftwarePlatform/MIOpen,ROCmSoftwarePlatform/MIOpen