New arg skip altp2m check (Qubes r4.x compatability)

[scrubbedha]

Thanks in advance @tklengyel for reviewing this PR.

This PR is directly related to your comment on the issue here: QubesOS/qubes-issues#2417 (comment)

Sorry, I meant you could add --skip-altp2m-check, then you wouldn't have to patch out-of-tree ;)

Apologies for the confusion, I thought this argument already existed in the codebase. So I did my best to add this functionality. Reviewer beware: total acolyte level C/C++ programmer here. Please, if you have the cycles and there is a more elegant way to implement this I'd be extremely grateful.

TL;DR
I'm also in the midst of recompiling qubes-vmm-xen with Flask/XSM support to see if I can get your policy working: tklengyel/xen@bfdf206

Feel the need to reiterate a very heartfelt warm "thank you" in earnest for taking the time out of your day to write those awesome crits/comments/feedback here: https://github.com/QubesOS/qubes-issues/issues/2417#issuecomment-1832972798 f for my Qubes + Drakvuf guide: https://github.com/scrubbedha/Qubes_Drakvuf/blob/master/README.md#drakvuf-black-box-binary-analysis-systemqubes-42qubes-42

[drakvuf-jenkins]

Can one of the admins verify this patch?