Move Config loading to a service provider (#13927)

* Move Config loading to a service provider
That way other service providers can depend on it
Move various random listener registrations into the EventServiceProvider
Various startup cleanup

* Config::persist Set live variable before persisting incase db update fail

* Disable strict mode for legacy code (init.php)

* Disable debug after os test data is gathered

* remove Eloquent::boot it is never used

* remove Eloquent::version

* lint fixes

* style fixes

* there is no c_echo here

LibreNMS/IRCBot.php

@@ -602,7 +602,7 @@ class IRCBot
     {
         if (! Eloquent::isConnected()) {
             try {
-                Eloquent::boot();
+                Eloquent::DB()->statement('SELECT VERSION()');
             } catch (\PDOException $e) {
                 $this->log('Cannot connect to MySQL: ' . $e->getMessage());