Fix #181: Queue adhoc tasks by duration #123

Job	Run time
ci / check if job needs to run	4s
ci / prepare test matrix	9s
ci / MOODLE_401_STABLE - pgsql - php 7.4 - mod_reengagement	2m 55s
ci / MOODLE_401_STABLE - mariadb - php 7.4 - mod_reengagement	2m 46s
ci / MOODLE_400_STABLE - pgsql - php 7.3 - mod_reengagement	3m 4s
ci / MOODLE_401_STABLE - pgsql - php 8.0 - mod_reengagement	3m 21s
ci / MOODLE_401_STABLE - mariadb - php 8.0 - mod_reengagement	3m 28s
ci / MOODLE_402_STABLE - mariadb - php 8.0 - mod_reengagement	2m 58s
ci / MOODLE_402_STABLE - pgsql - php 8.0 - mod_reengagement	3m 5s
ci / MOODLE_402_STABLE - pgsql - php 8.1 - mod_reengagement	2m 50s
ci / MOODLE_402_STABLE - mariadb - php 8.1 - mod_reengagement	2m 42s
ci / MOODLE_403_STABLE - pgsql - php 8.0 - mod_reengagement	3m 2s
ci / MOODLE_403_STABLE - mariadb - php 8.0 - mod_reengagement	3m 11s
ci / MOODLE_403_STABLE - mariadb - php 8.2 - mod_reengagement	3m 5s
ci / MOODLE_403_STABLE - pgsql - php 8.2 - mod_reengagement	3m 16s
ci / Release to the Moodle plugin directory	0s
	39m 56s

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