Fix PHP 7.4 MariaDB test, Drop experimental MariaDB tests

[gregcorbett]

This PR reworks the test MariaDB tests to:

• Drop experimental PHP 7.2 and 7.3 MariaDB tests
  • they have never worked and our PHP upgrade to 7 is going to be to 7.4 as this is the highest 7.X version readily install-able on Rocky8
• Drop PHP 8.0 MariaDB test for now
  • it requires a later reelase of version 2.X of the Doctrine ORM before the tests will even run.
• Fix the PHP 7.4 test for MariaDB
  • This involves supplying seperate composer.json/lock files to run different versions of Doctrine, as there is no version that supports both PHP <7.4 and >7.4.
  • Drop the experimental from the PHP 7.4 test as it is now expected to pass.

Fixing the PHP 7.4 test for MariaDB highlighted a few things that wouldn't work under PHP 7.4 and this PR also addresses those.

• Fix count() error in tests
• Escape hyphens in Site HOME/GIIS URL regexes
• Fix misc PHP7.4 Notices and Warnings

[gregcorbett]

Forgot about the code climate issues

[gregcorbett]

Forgot about the code climate issues

and about actually testing these changes don't break anything 😋