Revert ".cirrus.yml: Reenable CI with pre-commit CI scripts"

This reverts commit 676d64ee8327851063d92d0dd6a4ceee6b3a25e6.

These tests take a combined 3h to run and are consuming our montly
Cirrus-CI credits in short order, before failing.

In the PR markj reports that the failure appeared somewhere between:

good: da64f6e047b5f6cd9b9e8450d19072cb0b6e44d0
bad: b197d2abcb6895d78bc9df8404e374397aa44748

Unfortunately, even after we find the offending commit and have a fix we
still do not have sufficient monthly compute credit. Disable these
tests for now, pending a solution to both issues.

PR: 289696
Reviewed by: ngie
Differential Revision: https://reviews.freebsd.org/D52618

(cherry picked from commit 2b8bfdcad1f46076eaf40938634538fbcb13cb1c)