kernel: chainparams updates for 27.x

[fanquake]

Update chainparams pre 27.x branch off.

Note: Remember that some variance is expected in the m_assumed_* sizes.

[DrahtBot]

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Code Coverage

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Reviews

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Type	Reviewers
ACK	Sjors, glozow, instagibbs

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Conflicts

Reviewers, this pull request conflicts with the following ones:

• #29198 (OP_CHECKTEMPLATEVERIFY, OP_CHECKSIGFROMSTACK(VERIFY), OP_INTERNALKEY validation (LNHANCE) by reardencode)
• #27433 (getblocktemplate improvements for segwit and sigops by Sjors)
• #26201 (Remove Taproot activation height by Sjors)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

[Sjors]

ACK d9f30b0

[glozow]

ACK d9f30b0 (checked mainnet locally, checked testnet/signet on block explorers and sanity checked the numbers)

[instagibbs]

ACK d9f30b0

only checked mainnet params locally