use `ubuntu-latest` during CI

[muzarski]

Once ubuntu-24.04 runner images are stabilized, we should use them during CI.

As of now, there are two major issues that prevent us from using ubuntu-24.04 images:

• sudo does not work in a fedora container running on top of ubuntu-24.04 image (Build rpm packages job):

sudo: PAM account management error: Authentication service cannot retrieve authentication info
sudo: a password is required
Error: Process completed with exit code 1.

• Scylla does not listen on jmx port (7199) on ubuntu-24.04 image: