Find redhat kernel version command gives invalid output when multiple versions are installed

[Kevin Reeuwijk]

When building Rocky 9 images for MAAS, if you update the kernel in the source image and don't clean up the previous kernel version, the "rpm -q --queryformat "%{VERSION}-%{RELEASE}.%{ARCH}" kernel" command returns an invalid string like this:

# rpm -q --queryformat "%{VERSION}-%{RELEASE}.%{ARCH}" kernel
5.14.0-162.6.1.el9_1.x86_645.14.0-362.24.1.el9_3.0.1.x86_64

This causes the subsequent initramfs command to fail, resulting in a failed OS deployment:

finish: cmd-install/stage-curthooks/builtin/cmd-curthooks/updating-initramfs-configuration: FAIL: updating initramfs configuration
finish: cmd-install/stage-curthooks/builtin/cmd-curthooks: FAIL: curtin command curthooks
Traceback (most recent call last):
  File "/curtin/curtin/commands/main.py", line 202, in main
    ret = args.func(args)
  File "/curtin/curtin/commands/curthooks.py", line 1918, in curthooks
    builtin_curthooks(cfg, target, state)
  File "/curtin/curtin/commands/curthooks.py", line 1863, in builtin_curthooks
    redhat_update_initramfs(target, cfg)
  File "/curtin/curtin/commands/curthooks.py", line 1696, in redhat_update_initramfs
    in_chroot.subp(dracut_cmd, capture=True)
  File "/curtin/curtin/util.py", line 792, in subp
    return subp(*args, **kwargs)
  File "/curtin/curtin/util.py", line 280, in subp
    return _subp(*args, **kwargs)
  File "/curtin/curtin/util.py", line 144, in _subp
    raise ProcessExecutionError(stdout=out, stderr=err,
curtin.util.ProcessExecutionError: Unexpected error while running command.
Command: ['unshare', '--fork', '--pid', '--', 'chroot', '/tmp/tmpms1dg_tc/target', 'dracut', '-f', '/boot/initramfs-5.14.0-162.23.1.el9_1.x86_645.14.0-362.24.1.el9_3.0.1.x86_64.img', '5.14.0-162.23.1.el9_1.x86_645.14.0-362.24.1.el9_3.0.1.x86_64']
Exit code: 1
Reason: -
Stdout: /etc/dracut.conf.d/50-curtin-storage.conf:add_dracutmodules+=" lvm"

Stderr:
        dracut: WARNING: <key>+=" <values> ": <values> should have surrounding white spaces!
        dracut: WARNING: This will lead to unwanted side effects! Please fix the configuration file.

        dracut: Cannot find module directory /lib/modules/5.14.0-162.23.1.el9_1.x86_645.14.0-362.24.1.el9_3.0.1.x86_64/
        dracut: and --no-kernel was not specified

Unexpected error while running command.

The command should be altered to something that returns only the latest installed kernel version.
For example:

# ls -t /lib/modules | head -1
5.14.0-362.24.1.el9_3.0.1.x86_64