Remove test namespace linting.

[aaronweeden]

Description

In conjunction with ubccr/xdmod-qa#29, this PR moves the automated check of inconsistent test namespaces from #1795 out of the xdmod CircleCI config and into the xdmod-qa style tests for PHP files that have been added or changed. This way, the code does not have to be duplicated in the CircleCI config of each submodule of XDMoD, and it does not have to run for every file, only those that changed.

Tests performed

In a Docker container running tools-ext-01.ccr.xdmod.org/xdmod-10.5.0-x86_64:rockylinux8.5-0.3:

git clone https://github.com/ubccr/xdmod /xdmod
git clone https://github.com/aaronweeden/xdmod-qa -b lint-test-namespaces /xdmod-qa
cd /xdmod-qa
composer install
cd /xdmod

Change namespaces in the tests directories and confirm this outputs them and fails the style tests:

/xdmod-qa/scripts/build.sh --remote remotes/origin/xdmod11.0 -s

Checklist:

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