Fix KPack and enable existing instances on gfx950

[jefyang1]

Proposed changes

Please describe the motivation behind the pull request, whether it enables a new feature or fixes a bug. If there are associated pull requests or issues, please link them to the pull request.

Checklist

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• I have added tests relevant to the introduced functionality, and the unit tests are passing locally
• I have added the test to REGRESSION_TESTS list defined at the top of CMakeLists.txt in tests/CMakeLists.txt, IF the test takes more than 30 seconds to run.
• I have added inline documentation which enables the maintainers with understanding the motivation
• I have removed the stale documentation which is no longer relevant after this pull request
• (If this change is user-facing) I have added release notes which provide the end users with a brief summary of the improvement from this pull request
• [x ] I have run clang-format on all changed files
• Any dependent changes have been merged

Discussion

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[spolifroni-amd]

Nothing for docs.

[aosewski]

This PR has plethora of conflicts, which looks like unsucessful merge with develop. Please fix them

The merge issues were caused by changes in the develop branch history.