use per-puzzle cost to estimate DEDUP savings

[arvidn]

Purpose:

The most recent chia_rs update included a feature where run_block_generator2() records the execution cost and condition cost per puzzle/spend. Use that cost in MempoolItem to estimate the cost savings when deduplicating spends (in the dedup feature).

Today we run the puzzle again in order to know the cost. This both simplifies and optimizes the DEDUP feature.

This is a step towards exploring using the "puzzle fingerprint" rather than solution bytes to compare equality of spends. i.e. to compare the condition outputs rather than the actual solution.

Current Behavior:

• We use run_for_cost(), per puzzle, to compute the per-puzzle cost. Used in dedup.
• The data structure supports optional cost, and computing it lazily

New Behavior:

• We use just populate the MempoolItem's cost field directly from the result of validating the spend bundle.
• The data structure has the cost as non-optional and is always available

[coveralls-official]

Pull Request Test Coverage Report for Build 16573949364

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 62 of 62 (100.0%) changed or added relevant lines in 5 files are covered.
• 420 unchanged lines in 23 files lost coverage.
• Overall coverage decreased (-0.05%) to 91.324%

---

Files with Coverage Reduction	New Missed Lines	%
chia/daemon/client.py	1	74.72%
chia/daemon/server.py	1	83.57%
chia/_tests/wallet/cat_wallet/test_cat_wallet.py	1	99.58%
chia/types/blockchain_format/program.py	1	91.67%
chia/consensus/pot_iterations.py	2	94.44%
chia/_tests/core/full_node/stores/test_block_store.py	2	99.53%
chia/timelord/timelord_launcher.py	2	90.71%
chia/wallet/transaction_record.py	2	95.69%
chia/wallet/wallet_state_manager.py	2	96.52%
chia/rpc/rpc_server.py	3	88.54%

Totals
Change from base Build 16332491766:	-0.05%
Covered Lines:	101834
Relevant Lines:	111387

---

💛 - Coveralls

[AmineKhaldi]

Looks good. Due to the amount of review suggestions I sent an addendum (PR #19816) to take care of all of them.

[wjblanke]

aok