Bug 32349: Remove TEST_QA

Bug 32349: Remove TEST_QA

There is an env var that we are passing from koha-testing-docker, TEST_QA.
It's used in Koha from a single test file, t/00-testcritic.t.
If not set, no test is run.

Do we really need this? libtest-perl-critic-perl is packaged and automatically installed.

Signed-off-by: Mason James <mtj@kohaaloha.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 0adc264edb3172f7d2dca771efbe19d15f240d8f)
Signed-off-by: Jacob O'Mara <jacob.omara@ptfs-europe.com>