Add motifcheck actor for RHEL 9 to RHEL 10 upgrade

[tpelka83]

Add a new actor to detect the Motif package on RHEL 9 systems and warn users that Motif is no longer available in RHEL 10. The actor creates a high-severity report recommending migration to alternative GUI toolkits such as GTK or Qt.

Related: DESKTOP-1399

This is my first PR for this project so please excuse potential issues, let me please know how should I fix them.

[github-actions]

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[tpelka83]

/packit test

[matejmatuska]

Some small changes required, other than that looks good. Also please make the linter happy, you can see what it complains about in the GitHub action.

[matejmatuska]

/packit test