Fixes #37963 - Make SeedHelper.test_template_requirements public

[adamruzicka]

To allow using it from plugins seeding their own templates.

[ekohl]

While looking at this method my mind was rewriting this to .all? to avoid the explicit return statements.

[ekohl]

The Katello failure is unrelated:

Failure: test_0636_route api/v2/home/status should have a permission that grants access ActiveRecord::ConnectionTimeoutError: could not obtain a connection from the pool within 5.000 seconds (waited 5.005 seconds); all pooled connections were in use test/test_helper.rb:88:in `before_setup'

We have a workaround for this in the installer, but it's obviously also needed in test (and I've also seen in in dev). The cause is Katello spawning additional threads that eat up the pool.