scripted-diff: test: Rename send_message to send_without_ping

send_message only drops the bytes in a buffer and a sync is needed to
avoid intermittent test issues. Change the name of the method to make
this more apparent during review.

-BEGIN VERIFY SCRIPT-
 sed -i 's/send_message(/send_without_ping(/g' $( git grep -l 'send_message(' )
-END VERIFY SCRIPT-

test/functional/p2p_opportunistic_1p1c.py

@@ -249,7 +249,7 @@ class PackageRelayTest(BitcoinTestFramework):
         assert tx_orphan_bad_wit.rehash() not in node_mempool
 
         # 5. Have the other peer send the tx too, so that tx_orphan_bad_wit package is attempted.
-        bad_orphan_sender.send_message(msg_tx(low_fee_parent["tx"]))
+        bad_orphan_sender.send_without_ping(msg_tx(low_fee_parent["tx"]))
         bad_orphan_sender.wait_for_disconnect()
 
         # The peer that didn't provide the orphan should not be disconnected.