Merge bitcoin#31408: test: Avoid logging error when logging error

cccca8a test: Avoid logging error when logging error (MarcoFalke)

Pull request description:

  Currently a logging error in the form of `--- Logging error ---` happens when an error is logged in the `_on_data` helper.

  Fix it by properly logging the error.

  Also, treat pylint errors as errors, to avoid this problem in the future.

  Can be tested by running `p2p_addrv2_relay.py` with the following example diff:

  ```diff
  diff --git a/test/functional/test_framework/p2p.py b/test/functional/test_framework/p2p.py
  index 523e1bd068..0f1eb29d13 100755
  --- a/test/functional/test_framework/p2p.py
  +++ b/test/functional/test_framework/p2p.py
  @@ -137,7 +137,7 @@ MESSAGEMAP = {
       b"notfound": msg_notfound,
       b"ping": msg_ping,
       b"pong": msg_pong,
  -    b"sendaddrv2": msg_sendaddrv2,
  +    #b"sendaddrv2": msg_sendaddrv2,
       b"sendcmpct": msg_sendcmpct,
       b"sendheaders": msg_sendheaders,
       b"sendtxrcncl": msg_sendtxrcncl,

ACKs for top commit:
  fanquake:
    ACK cccca8a

Tree-SHA512: dd19f3feed0093246cb205903529fb9ebd5ad9a6c9330cfc5987c0154253c9dcec8d0e25ff99e4ac806a464ff58c3787a205378b8dfb7a1a521da25eac429136

test/functional/test_framework/p2p.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 # Copyright (c) 2010 ArtForz -- public domain half-a-node
 # Copyright (c) 2012 Jeff Garzik
-# Copyright (c) 2010-2022 The Bitcoin Core developers
+# Copyright (c) 2010-present The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test objects for interacting with a bitcoind node over the p2p protocol.
@@ -369,7 +369,7 @@ def _on_data(self):
                 self.on_message(t)
         except Exception as e:
             if not self.reconnect:
-                logger.exception('Error reading message:', repr(e))
+                logger.exception(f"Error reading message: {repr(e)}")
             raise
 
     def on_message(self, message):
@@ -659,7 +659,7 @@ def wait_for_getheaders(self, block_hash=None, *, timeout=60):
         def test_function():
             last_getheaders = self.last_message.pop("getheaders", None)
             if block_hash is None:
-                 return last_getheaders
+                return last_getheaders
             if last_getheaders is None:
                 return False
             return block_hash == last_getheaders.locator.vHave[0]

test/lint/test_runner/src/main.rs

@@ -236,6 +236,7 @@ fn lint_py_lint() -> LintResult {
             "F822", // undefined name name in __all__
             "F823", // local variable name … referenced before assignment
             "F841", // local variable 'foo' is assigned to but never used
+            "PLE", // Pylint errors
             "W191", // indentation contains tabs
             "W291", // trailing whitespace
             "W292", // no newline at end of file