Merge bitcoin/bitcoin#24154: test: add functional test for -maxtipage parameter

75656adfd2 test: add functional test for `-maxtipage` parameter (Sebastian Falbesoner)

Pull request description:

  This PR adds a missing test for the `-maxtipage` parameter which controls what is the allowed maximum tip age for leaving IBD:
  https://github.com/bitcoin/bitcoin/blob/792d0d8d512cf8ddca200317b74ce550c1a1a428/src/init.cpp#L540

  Relevant code path in the `CChainState::IsInitialBlockDownload` method:
  https://github.com/bitcoin/bitcoin/blob/792d0d8d512cf8ddca200317b74ce550c1a1a428/src/validation.cpp#L1479-L1480

  The test is pretty simple and should be self-explanatory.

ACKs for top commit:
  MarcoFalke:
    review ACK 75656adfd2

Tree-SHA512: 0a10dca13cb18c29e64fc8412f4c8f2bcaff1bab8645bd85266c242ba88ce036a150c03cbbe9810c3bb44649810af0aa9cb3584dbae886a7bdb16b72150d08de

test/functional/test_runner.py

@@ -198,6 +198,7 @@ BASE_SCRIPTS = [
     'wallet_keypool.py --legacy-wallet',
     'wallet_keypool.py --descriptors',
     'wallet_descriptor.py --descriptors',
+    'feature_maxtipage.py',
     'p2p_nobloomfilter_messages.py',
     'p2p_filter.py',
     'rpc_setban.py',