pm4 packet regression tests (revised)

[rocm-devops]

Note: This PR is a re-work of #98. It no longer does html reports

These tests do the following:

1. Generates packet dump files for PMC/SQTT/SPM for supported GFX and blocks
2. Compares the packet dumps against baseline packet dumps using pytest
3. pytest reports which packet dumps failed. E.g - which PMC block, SQTT, SPM block
4. Tests build only with AQLPROFILE_BUILD_TESTS. Meant to run in CI.
5. Packet dumps for each GPU are separate. Test runs for a specific GPU and detects the gfx_version automatically;
   hence it needs proper rocm setup.
6. Users can see the exact command packets which are different from the baseline by comparing the debug_trace.txt logs manually.
7. The dumps files are per GPU. Support for any GPU can be added easily by simply adding baseline files

Expected folder structure of dump:

[ammallya]

Imported to ROCm/rocm-systems