fix!: adjust filename of log files to include datetime #3084

Job	Run time
ci / check if job needs to run	6s
ci / prepare test matrix	20s
ci / MOODLE_310_STABLE - pgsql - php 7.2 - tool_dataflows	4m 31s
ci / MOODLE_311_STABLE - mariadb - php 7.3 - tool_dataflows	7m 17s
ci / MOODLE_35_STABLE - mariadb - php 7.1 - tool_dataflows	5m 5s
ci / MOODLE_35_STABLE - pgsql - php 7.1 - tool_dataflows	3m 27s
ci / MOODLE_35_STABLE - mariadb - php 7.2 - tool_dataflows	5m 1s
ci / MOODLE_35_STABLE - pgsql - php 7.2 - tool_dataflows	3m 22s
ci / MOODLE_36_STABLE - mariadb - php 7.1 - tool_dataflows	5m 27s
ci / MOODLE_37_STABLE - pgsql - php 7.2 - tool_dataflows	3m 46s
ci / MOODLE_38_STABLE - mariadb - php 7.3 - tool_dataflows	5m 29s
ci / MOODLE_39_STABLE - mariadb - php 7.2 - tool_dataflows	5m 21s
ci / MOODLE_39_STABLE - pgsql - php 7.2 - tool_dataflows	5m 15s
ci / MOODLE_39_STABLE - mariadb - php 7.3 - tool_dataflows	5m 19s
ci / MOODLE_39_STABLE - pgsql - php 7.3 - tool_dataflows	5m 58s
ci / MOODLE_400_STABLE - pgsql - php 7.3 - tool_dataflows	3m 45s
ci / MOODLE_401_STABLE - pgsql - php 7.4 - tool_dataflows	3m 42s
ci / MOODLE_401_STABLE - mariadb - php 7.4 - tool_dataflows	5m 14s
ci / MOODLE_401_STABLE - pgsql - php 8.0 - tool_dataflows	5m 4s
ci / MOODLE_401_STABLE - mariadb - php 8.0 - tool_dataflows	5m 50s
ci / Release to the Moodle plugin directory	0s
	1h 29m 19s

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