Reduce release packaging

[jrmadsen]

• Drop release packaging for ROCm < 5.3
  • ROCm is no longer providing release for Ubuntu 18.04 starting with 5.3 so omnitrace is dropping release packaging for Ubuntu 18.04 + ROCm
  • Dropping ROCm 5.2 releases for Ubuntu 20.04
  • Dropping ROCm 5.2 releases for OpenSUSE 15.4
• Drop all RHEL 9.0 packaging
• Drop all packaging for ROCm 5.3 on OSes supporting where releases are provided for 5.4, 5.5, and 5.6
• Update RedHat workflow
  • Test RedHat 9.1 + ROCm 5.5
  • Test RedHat 9.1 + ROCm 5.6
• Update Ubuntu focal workflow
  • Drop ROCm 5.2 from testing
  • Add ROCm 5.6 to testing
• Miscellaneous fixes for RedHat 9.1 + ROCm 5.5 and 5.6