relax PoS validation in weight proofs

[arvidn]

Purpose:

When validating proofs of space in weight proofs, we don't necessarily know the height of the block, or the previous transaction block height.

This information is technically required to validate the proof-of-space. The reason for this is that the 3.0 hard fork will introduce a phase-out schedule for v1 plots, where the validity of a v1 proof depends on how far long the phase-out we've come.

Since we don't know the height, this patch relaxes the validation to not apply the phase-out to v1 plots.

We also use the height to determine the plot filter schedule. However, both the v1 and v2 plot filters relax over time, so using the peak block height will already use the most relaxed plot filter for the lower heights.

Current Behavior:

• We don't support the v1 phase-out in weight proofs

New Behavior:

• we do support the v1 phase-out, by not applying it to weight proofs

[github-actions]

File	Coverage	Missing Lines
chia/types/blockchain_format/proof_of_space.py	75.0%	lines 140-141

Total	Missing	Coverage
8 lines	2 lines	75%

[coveralls-official]

Pull Request Test Coverage Report for Build 19700259327

Details

• 6 of 8 (75.0%) changed or added relevant lines in 1 file are covered.
• 25 unchanged lines in 6 files lost coverage.
• Overall coverage increased (+0.2%) to 90.915%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
chia/types/blockchain_format/proof_of_space.py	6	8	75.0%

Files with Coverage Reduction	New Missed Lines	%
chia/full_node/full_node_rpc_api.py	1	79.22%
chia/full_node/full_node.py	3	87.01%
chia/timelord/timelord.py	3	71.68%
chia/wallet/wallet_node.py	3	86.39%
chia/server/server.py	4	84.05%
chia/server/node_discovery.py	11	79.61%

Totals
Change from base Build 19682443433:	0.2%
Covered Lines:	102650
Relevant Lines:	112766

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💛 - Coveralls