Comment out test checks that are causing failures on ^/stable/11, post r337133

[ngie]

Summary

Some usr.bin/procstat code has not been MFCed to ^/stable/11 for command line
handling, and unfortunately, r337133 (which was MFCed as r337542) relies on
that support.

Comment out the checks and add a pointer to the PR for code archaeology and
to cause future potential parties to verify changes when backporting them.

This is a direct commit to ^/stable/11

PR: 237445

Test Plan

kyua test passed on 11.2-RELEASE-p7 host.