fa04f26aa77d2cf746db4a8a43068b7c5c9cd02b test: Avoid race after connect_nodes (MarcoFalke)
Pull request description:
Wait until the connection is fully established on both sides (verack). Fixes#22714
ACKs for top commit:
kiminuo:
utACK fa04f26aa77d2cf746db4a8a43068b7c5c9cd02b
Tree-SHA512: bc2c44b44b688086ff84046924cf5251dd625584e93ce8fa17de27023855b32f3bb55109b846abbcec775e2836c7f3c5a81d6b4aff7c4ac065b9aefa044c1883