The originals run GiveItem before printing the received texts, and when
the bag can't hold the TM they print a make-room line instead and leave
EVENT_GOT_TM* unset, so talking to the leader again retries the give.
The victory reward path added the TM straight into the inventory, so a
full bag went to 21/20.
Route the gym TM give through Bag.add, split the TM lines out of the
victory dialogue table into tmPre/tmDialogue/noRoom, and port the
beaten-leader middle branch that re-runs the ReceiveTM script. Saves
that already hold the TM without the flag count as received so they
don't collect a second copy.
Refs #797
johnjohto
bryanthaboi