Deprecate the phpdbg option for code coverage #642

Job	Run time
Code coverage (codecov)	58s
CI test (make validate)	59s
Integration tests (8.3, main)	6m 26s
Build moodle-plugin-ci.phar	40s
Integration tests (8.2, MOODLE_403_STABLE)	5m 58s
Integration tests (8.2, MOODLE_402_STABLE)	6m 10s
Integration tests (8.1, MOODLE_401_STABLE)	6m 35s
Integration tests (8.0, MOODLE_400_STABLE)	6m 21s
Integration tests (8.0, MOODLE_311_STABLE)	5m 57s
Integration tests (7.4, MOODLE_39_STABLE)	5m 41s
Integration tests (PHAR) (8.3, main)	5m 57s
SelfUpdate tests (PHAR) (8.3)	35s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE)	6m 2s
SelfUpdate tests (PHAR) (8.2)	30s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE)	5m 12s
SelfUpdate tests (PHAR) (8.1)	23s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 51s
SelfUpdate tests (PHAR) (8.0)	23s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 43s
SelfUpdate tests (PHAR) (7.4)	13s
	1h 17m 34s

Provide feedback