CHIA-3737 Simplify BundleCoinSpend's tracking of fast forward spends

[AmineKhaldi]

Purpose:

Instead of tracking eligible_for_fast_forward introduce a supports_fast_forward property that is true when a spend has fast forward unspent lineage information.

This simplifies determining when a spend supports fast forward without data duplication, and it renders the state where eligible_for_fast_forward is true without lineage information, impossible.

Current Behavior:

We track fast forward spends information through both eligible_for_fast_forward and latest_singleton_lineage.

New Behavior:

We determine supports_fast_forward based on latest_singleton_lineage.

Testing Notes:

[coveralls-official]

Pull Request Test Coverage Report for Build 17768307977

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

• 24 of 24 (100.0%) changed or added relevant lines in 5 files are covered.
• 6 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-0.003%) to 91.245%

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Files with Coverage Reduction	New Missed Lines	%
chia/daemon/client.py	1	74.16%
chia/daemon/keychain_proxy.py	1	70.57%
chia/farmer/farmer.py	1	73.32%
chia/full_node/full_node_api.py	1	85.52%
chia/server/node_discovery.py	2	82.11%

Totals
Change from base Build 17740066828:	-0.003%
Covered Lines:	102795
Relevant Lines:	112519

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💛 - Coveralls

[arvidn]

looks good

[arvidn]

I'm not sure what's missing for this to be ready for review

[AmineKhaldi]

I'm not sure what's missing for this to be ready for review

It was failing CI so it didn't get undrafted.