merge-script f5f3e1f263 Merge bitcoin/bitcoin#32646: p2p: Add witness mutation check inside FillBlock
28299ce776 p2p: remove vestigial READ_STATUS_CHECKBLOCK_FAILED (Greg Sanders)
bac9ee4830 p2p: Add witness mutation check inside FillBlock (Greg Sanders)

Pull request description:

  Since #29412, we have not allowed mutated blocks to continue being processed immediately the block is received, but this is only done for the legacy BLOCK message.

  Extend these checks as belt-and-suspenders to not allow similar mutation strategies to affect relay by honest peers by applying the check inside `PartiallyDownloadedBlock::FillBlock`, immediately before returning `READ_STATUS_OK`.

ACKs for top commit:
  Crypt-iQ:
    ACK 28299ce776
  achow101:
    ACK 28299ce776
  stratospher:
    ACK 28299ce7.
  dergoegge:
    Code review ACK 28299ce776

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