Merge bitcoin/bitcoin#27324: net: #27257 follow-ups

cd0c8eeb09 [net] Pass nRecvFloodSize to CNode (dergoegge)
860402ef2e [net] Remove trivial GetConnectionType() getter (dergoegge)
b5a85b365a [net] Delete CNetMessage copy constructor/assignment op (dergoegge)

Pull request description:

  Follow-up PR for #27257

  * Deletes the copy constructor/assignment operator of `CNetMessage`
  * Removes trivial getter for the connection type
  * Avoids passing `nRecvFloodSize` to CNode methods by passing it to `CNode` on creation

ACKs for top commit:
  jnewbery:
    utACK cd0c8eeb09
  theStack:
    ACK cd0c8eeb09

Tree-SHA512: 673a758668617f69fba77e61f0eaa1538da27a4849c82c98742436692baa2d7f001129af3e7a66b160e599d12109dac08137a146f10ff9b9ebdc5c2237311d41

src/test/fuzz/connman.cpp

@@ -125,7 +125,6 @@ FUZZ_TARGET_INIT(connman, initialize_connman)
     std::vector<CNodeStats> stats;
     connman.GetNodeStats(stats);
     (void)connman.GetOutboundTargetBytesLeft();
-    (void)connman.GetReceiveFloodSize();
     (void)connman.GetTotalBytesRecv();
     (void)connman.GetTotalBytesSent();
     (void)connman.GetTryNewOutboundPeer();

src/test/util/net.cpp

@@ -66,7 +66,7 @@ void ConnmanTestMsg::NodeReceiveMsgBytes(CNode& node, Span<const uint8_t> msg_by
 {
     assert(node.ReceiveMsgBytes(msg_bytes, complete));
     if (complete) {
-        node.MarkReceivedMsgsForProcessing(nReceiveFloodSize);
+        node.MarkReceivedMsgsForProcessing();
     }
 }