Moodle 4.5 support

[dmitriim]

Stuff to consider:

• make the eventlist compatible with Moodle 4.3 #888
• No longer using externallib.php #802
• 796 fix moodle 42 fatal with core external lib changes #803
• PHPUnit 10 Deprecations (Moodle 4.4+) #883
• Deprecations PHP 8.2 #856
• tool_dataflows still dependent on local_aws in MOODLE_405_STABLE Branch #931
• Fix PHP Unit codechecker failures #976