libinih-dev on Bionic does not provide a .pc file, so PKG_CHECK_MODULES
fails on this target. This commit disables the CI build on Bionic until
we have a workaround.
This workflow runs only if there is a change to the kernel_module path.
Consequently, commits that only impact the kernel_module will be ignored
for the standard userspace driver build.
This commit also updates the CodeQL workflow to only run on a scheduled
basis and on pull requests, but not on every push, since this is a
fairly slow script.
Finally, this commit also removes the obsolete kernel module sources,
since they are no longer maintained, and it also provides a hook for
Github actions to pick up and execute the kernel workflow.
This commit adds workflows to handle the continuous integration builds
as well as the CodeQL analysis on each push. This also adds a workflow
to create a release and upload the orig.tar.gz file when pushing a tag.