Harmonize engine/{movie, pokemon} with pokegold (renames GetSRAMBank to OpenSRAM)

To do: engine/{menus, overworld}

engine/events/lucky_number.asm

@@ -20,7 +20,7 @@ CheckForLuckyNumberWinners:
 	dec d
 	jr nz, .PartyLoop
 	ld a, BANK(sBox)
-	call GetSRAMBank
+	call OpenSRAM
 	ld a, [sBoxCount]
 	and a
 	jr z, .SkipOpenBox
@@ -59,7 +59,7 @@ CheckForLuckyNumberWinners:
 	add hl, bc
 	add hl, bc
 	ld a, [hli]
-	call GetSRAMBank
+	call OpenSRAM
 	ld a, [hli]
 	ld h, [hl]
 	ld l, a ; hl now contains the address of the loaded box in SRAM