test: Add functional test for AddrFetch connections

Co-authored-by: Amiti Uttarwar <amiti@uttarwar.org>

test/functional/test_runner.py

@@ -182,6 +182,7 @@ BASE_SCRIPTS = [
     'p2p_addr_relay.py',
     'p2p_getaddr_caching.py',
     'p2p_getdata.py',
+    'p2p_addrfetch.py',
     'rpc_net.py',
     'wallet_keypool.py --legacy-wallet',
     'wallet_keypool.py --descriptors',