Description of problem:

When booted with kernel-rt, executing stap-prep script still tries to install non-existing packages:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

1. uname -r
   5.14.0-162.6.1.rt21.168.el9_1.x86_64

1. stap-prep
   Configuring for kernel release 5.14.0-162.6.1.rt21.168.el9_1.x86_64
   Debuginfo automatic downloading is not configured via $DEBUGINFOD_URLS
   Need to install the following packages:
   kernel-5.14.0-162.6.1.rt21.168.el9_1.x86_64
   kernel-devel-5.14.0-162.6.1.rt21.168.el9_1.x86_64
   kernel-debuginfo-5.14.0-162.6.1.rt21.168.el9_1.x86_64
   ...
   • • • • • • • 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

The root cause is the naming which doesn't match what must be used in stap-prep script (but I didn't check the script at all).
It searches for "kernel-" instead of "kernel-rt-", "kernel-debuginfo-" instead of "kernel-rt-debuginfo-" and "kernel-devel-" instead of "kernel-rt-devel-".

Version-Release number of selected component (if applicable):

systemtap-4.7-2.el9.x86_64

How reproducible:

Always

Steps to Reproduce:
1. Install kernel-rt and reboot
2. Execute stap-prep

Actual results:

Can't find packages

Expected results:

Install proper packages