Merge bitcoin/bitcoin#28805: test: Make existing functional tests compatible with --v2transport

35fb9930ad test: enable v2 transport for p2p_timeouts.py (Martin Zumsande)
2c1669c37a test: enable v2 transport for rpc_net.py (Sebastian Falbesoner)
cc961c2695 test: enable v2 transport for p2p_node_network_limited.py (Sebastian Falbesoner)
3598a1b5c9 test: enable --v2transport in combination with --usecli (Martin Zumsande)
68a9001751 test: persist -v2transport over restarts and respect -v2transport=0 (Martin Zumsande)

Pull request description:

  This makes the functional test suite compatible with BIP324, so that
  `python3 test_runner.py --v2transport`
  should succeed (currently, 12 tests fail for me on master).
  Includes two commits by TheStack I found in an old discussion https://github.com/bitcoin/bitcoin/pull/28331#discussion_r1326714164

  Note that even though all tests should pass, the python `p2p.py` module will do v2 connections only after the merge of #24748, so that for now only connections between two full nodes will actually run v2.
  Some of the fixed tests were added with `--v2transport` to the test runner. Though after #24748 we might also want to consider running the entire suite with `--v2transport` in some CI.

ACKs for top commit:
  sipa:
    utACK 35fb9930ad. Thanks for taking care of this.
  achow101:
    ACK 35fb9930ad
  theStack:
    ACK 35fb9930ad
  stratospher:
    ACK 35fb993.

Tree-SHA512: 80dc0bf211fa525ff1d092043aea9f222f14c02e5832a548fb8b83b9ede1fcee03c5e8ade0d05c331bdaa492af9c1cf3d0f0b15b846673c6eacea82dd4cefbc3

test/functional/test_runner.py

@@ -156,6 +156,7 @@ BASE_SCRIPTS = [
     'p2p_invalid_messages.py',
     'rpc_createmultisig.py',
     'p2p_timeouts.py',
+    'p2p_timeouts.py --v2transport',
     'wallet_dump.py --legacy-wallet',
     'rpc_signer.py',
     'wallet_signer.py --descriptors',
@@ -243,6 +244,7 @@ BASE_SCRIPTS = [
     'p2p_getdata.py',
     'p2p_addrfetch.py',
     'rpc_net.py',
+    'rpc_net.py --v2transport',
     'wallet_keypool.py --legacy-wallet',
     'wallet_keypool.py --descriptors',
     'wallet_descriptor.py --descriptors',
@@ -368,6 +370,7 @@ BASE_SCRIPTS = [
     'wallet_orphanedreward.py',
     'wallet_timelock.py',
     'p2p_node_network_limited.py',
+    'p2p_node_network_limited.py --v2transport',
     'p2p_permissions.py',
     'feature_blocksdir.py',
     'wallet_startup.py',