Prepare for 4.4.0 release #612

Job	Run time
CI test (make validate)	56s
Code coverage (codecov)	0s
SelfUpdate tests (PHAR) (8.2)	20s
SelfUpdate tests (PHAR) (8.1)	20s
SelfUpdate tests (PHAR) (8.0)	20s
SelfUpdate tests (PHAR) (7.4)	11s
Build moodle-plugin-ci.phar	32s
Integration tests (8.3, main)	6m 13s
Integration tests (8.2, MOODLE_403_STABLE)	6m 8s
Integration tests (8.2, MOODLE_402_STABLE)	5m 46s
Integration tests (8.1, MOODLE_401_STABLE)	6m 48s
Integration tests (8.0, MOODLE_400_STABLE)	6m 49s
Integration tests (8.0, MOODLE_311_STABLE)	6m 1s
Integration tests (7.4, MOODLE_39_STABLE)	5m 45s
Integration tests (PHAR) (8.3, main)	5m 57s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE)	6m 9s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE)	5m 22s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 37s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 41s
	1h 15m 55s

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