8098dea06944f9de8b285f44958eb98761f133ee test: Add mempool_updatefromblock.py (Hennadii Stepanov)
Pull request description:
This PR adds a new test for mempool update of transaction descendants/ancestors information (count, size) when transactions have been re-added from a disconnected block to the mempool.
It could be helpful for working on PRs like #17925, #18191.
ACKs for top commit:
ariard:
ACK 8098dea
Tree-SHA512: 7e808fa8df8d7d7a7dbdc3f79361049b49c7bce9b58fd5539b28c9636bedac747695537e500d7ed68dc8bdb80167ad3f1c01086f7551691405d2ba2e38ef1d06
