Copter: add Copter::option_enabled(...) replacing bitops vs copter.g2… #14266

Job	Run time
build (check_autotest_options)	1m 21s
build (param_parse)	40s
build (python-cleanliness)	45s
build (astyle-cleanliness)	56s
build (validate_board_list)	51s
	4m 33s

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