ci/codeql: use Ubuntu 24.04, adjust build flags

ci/codeql: use Ubuntu 24.04, adjust build flags

While in here drop the docs and manpages flags - both of those combined
take ~1s of CI time - and disable the sanitizers and tests instead.

This means we no longer get pre-existing code problems in the tests,
which is fine considering the number of pre-existing issues in there.
Another nice side effect is that the pipeline time is reduced by ~50%.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://github.com/kmod-project/kmod/pull/229
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>