Merge bitcoin/bitcoin#22582: test: a test to check descendant limits

fa7db1cbf7e8400b625fccd5757f8e1b200796bd [test] checks descendants limtis for second generation Package descendants (ritickgoenka)

Pull request description:

  This PR adds a new functional test to test the new descendant limits for packages that were proposed in #21800.
   ```
  +----------------------+
  |                      |
  |         M1           |
  |        ^  ^          |
  |       M2   ^         |
  |      .      ^        |
  |     .        ^       |
  |    .          ^      |
  |   .            ^     |
  |  M24            ^    |
  |                  ^   |
  |                  P1  |
  |                  ^   |
  |                  P2  |
  |                      |
  +----------------------+
  ```

  This test is for checking a transaction to fail its descendant count limits because of a combination of mempool descendants, package direct descendants, and package indirect descendants.

  In this test,  P1 has M1 as a mempool ancestor, P2 has no in-mempool ancestors, but when combined P2 has M1 as an ancestor and M1 exceeds descendant_limits (23 in-mempool descendants + 2 in-package descendants, a total of 26 including itself)

ACKs for top commit:
  ryanofsky:
    Code review ACK fa7db1cbf7e8400b625fccd5757f8e1b200796bd. Only were suggested changes since last review: simplifying test and dropping P3 transaction as John suggested, and adding assert_equal I suggested
  glozow:
    ACK fa7db1cbf7e8400b625fccd5757f8e1b200796bd
  jnewbery:
    ACK fa7db1cbf7

Tree-SHA512: d1eb993550ac8ce31cbe42e17c6522a213ede66970d5d9391f31a116477ab5889fefa6ff2df6ceadd63a28c1be1ad893b0e8e449247e9ade2ca61dc636508d68

0 files changed, 0 insertions, 0 deletions