G-API: clean up accuracy tests (#14945)

* Delete createOutputMatrices flag

Update the way compile args function is created

Fix instantiation suffix print function

* Update comment (NB)

* Make printable comparison functions

* Use defines instead of objects for compile args

* Remove custom printers, use operator<< overload

* Remove SAME_TYPE and use -1 instead

* Delete createOutputMatrices flag in new tests

* Fix GetParam() printed values

* Update Resize tests: use CompareF object

* Address code review feedback

* Add default cases for operator<< overloads

* change throw to GAPI_Assert