reload: Fix regression from #656 (#676)

Reverts the change in the reload command name to "Reload weapon" and check for existing binds on start, to respect player bind customization via the MTA settings.

Author: jlillis

[gameplay]/reload/reload_c.lua

@@ -1,5 +1,8 @@
-local reloadKey = "r"
-local reloadCmd = "reload"
+local reloadCmd = "Reload weapon"
+local reloadKey = getKeyBoundToCommand("Reload weapon")
+if not reloadKey then
+    reloadKey = "r"
+end
 
 local blockedTasks = {
     ["TASK_SIMPLE_JUMP"] = true,