Write a script to run kerneltests both locally and in CI

[Sylfrena]

Nuking the make targets for now, will try to write a script in a follow up PR(once Kemal's PR lands) that we can run both locally and in CI.

This means we now have a script (the vmtest.sh for running tests in qemu which we call from GH actions, and some intermediate commands in GitHub Actions to bridge the gap between goreleaser artifacts and the vmtests.

xref:

• CI: Add kerneltests for arm64 kernels #2243 (comment)
• CI: Add kerneltests for arm64 kernels #2243 (comment)

[javierhonduco]

lol I just created #2412, feel free to close it!

[javierhonduco]

There might be some files you might want to add to the .gitignore

[...]
#       new file:   kerneltest/logs/vm_log-5.10-amd64.txt
#       new file:   kerneltest/logs/vm_log-5.19-amd64.txt
#       new file:   kerneltest/logs/vm_log-5.4-amd64.txt
#       new file:   kerneltest/logs/vm_log-6.1-amd64.txt
#       new file:   kerneltest/logs/vm_log-6.5.0-14-arm64.txt