Remove unneeded component template YML test (#56791)

In 7.7 this test is unnecessary, as component templates were not used at all, and we now have tests
in the 7.8+ branches that test the functionality. The component template APIs were always behind a
system property flag and never actually exposed.

This test is causing failures where the system property flag was not set in all places where the
test was run, and rather than the added complexity of propogating the system property, it would be
better to remove the test from a branch where the functionality was never actually exposed.