Update EM->trigerUntil to be an alias of trigger

They contained the exact same code/logic. The only difference was the
conditional around checking if the callback was valid, but the outcome
is the same for both. This simply reduces duplicate code and causes no
change in behavior at all.
Deprecate EventManager->triggerUntil() method
Merge branch 'cs/#6953-code-quality-improvements'

Close #6953
Move error generation method to abstract controller
move the model creation logic to controller plugins
revert the missing docblocks
revert the method name change
revert the array syntax
fix docblocks in the new controller plugins
revert the array syntax
add tests for new functionality
update the list of plugins for autocomplete
add PHP_EOL to new controller plugins
fix wrong namespace import in console plugin
#6956 - adding deprecation notice for `AbstractController#createHttpNotFoundModel()` and `AbstractController#createConsoleNotFoundModel()` (to be removed in 2.5)
#6956 - fixed return types for `AbstractController#createHttpNotFoundModel()` and `AbstractController#createConsoleNotFoundModel()`
#6956 - removing unused imports and redundant docblocks
#6956 - removing unused import
#6956 - adding license headers, minor cs fixes (spacing)
#6956 - rewrote test case for the `CreateHttpNotFoundModel` controller plugin to be interacting on it as a unit test