tests: Bluetooth: tester: Fix assert in OTS

MCS OTS support doesn't implement OTS checksum and if this is globally
enabled assert is triggered.

[00:00:03.409,484] <dbg> bttester_gap: set_io_cap: io_cap: 0
ASSERTION FAIL [ots_init->cb->obj_cal_checksum]
     @ WEST_TOPDIR/zephyr/subsys/bluetooth/services/ots/ots.c:476
 Callback for object calculate checksum is not set

This should be reverted when Zephyr issue #72471 is fixed.

Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>

tests/bluetooth/tester/overlay-le-audio.conf

@@ -134,6 +134,8 @@ CONFIG_BT_MPL_OBJECTS=y
 CONFIG_BT_OTS=y
 CONFIG_BT_OTS_SECONDARY_SVC=y
 CONFIG_BT_OTS_MAX_OBJ_CNT=0x30
+#disable OTS checksum support until 72471 is fixed
+CONFIG_BT_OTS_OACP_CHECKSUM_SUPPORT=n
 CONFIG_BT_MCS=y
 CONFIG_MCTL_LOCAL_PLAYER_LOCAL_CONTROL=y
 CONFIG_MCTL_REMOTE_PLAYER_CONTROL_OBJECTS=y