Update gha.dist.yml to include MSSQL #5

Job	Run time
CI test (make validate)	1m 34s
Code coverage (codecov)	0s
Build moodle-plugin-ci.phar	31s
Integration tests (8.3, main)	6m 24s
Integration tests (8.3, MOODLE_404_STABLE)	6m 11s
Integration tests (8.2, MOODLE_403_STABLE)	6m 15s
Integration tests (8.2, MOODLE_402_STABLE)	5m 54s
Integration tests (8.1, MOODLE_401_STABLE)	6m 53s
Integration tests (8.0, MOODLE_400_STABLE)	6m 40s
Integration tests (8.0, MOODLE_311_STABLE)	6m 8s
Integration tests (7.4, MOODLE_39_STABLE)	5m 54s
SelfUpdate tests (PHAR) (8.3)	31s
Integration tests (PHAR) (8.3, main)	6m 3s
SelfUpdate tests (PHAR) (8.2)	23s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE)	5m 45s
SelfUpdate tests (PHAR) (8.1)	21s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE)	5m 44s
SelfUpdate tests (PHAR) (8.0)	23s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE)	5m 31s
SelfUpdate tests (PHAR) (7.4)	18s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 28s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 47s
	1h 29m 38s

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