introduce ELIGIBLE_FOR_FF flag on Spends via policy class #1226

Job	Run time
Check chia_rs.pyi	10s
build chia-tools	53s
Wheel - macOS 3.8 ARM	44s
clippy	1m 50s
sdist - Ubuntu 3.8 Intel	17s
Wheel - macOS 3.8 Intel	3m 42s
cargo fmt	15s
Wheel - macOS 3.9 ARM	45s
Wheel - macOS 3.9 Intel	2m 58s
fuzz_targets	7m 19s
Wheel - macOS 3.10 ARM	46s
Unit tests (macos-latest)	5m 0s
Wheel - macOS 3.10 Intel	2m 56s
Unit tests (ubuntu-latest)	5m 18s
Wheel - macOS 3.11 ARM	47s
Unit tests (windows-latest)	5m 1s
Wheel - macOS 3.11 Intel	3m 12s
Wheel - Ubuntu 3.8 ARM	2m 15s
Wheel - Ubuntu 3.8 Intel	3m 55s
Wheel - Ubuntu 3.9 ARM	2m 19s
Wheel - Ubuntu 3.9 Intel	3m 35s
Wheel - Ubuntu 3.10 ARM	2m 22s
Wheel - Ubuntu 3.10 Intel	3m 55s
Wheel - Ubuntu 3.11 ARM	2m 26s
Wheel - Ubuntu 3.11 Intel	3m 42s
Wheel - Windows 3.8 Intel	5m 0s
Wheel - Windows 3.9 Intel	4m 1s
Wheel - Windows 3.10 Intel	3m 53s
Wheel - Windows 3.11 Intel	5m 7s
Upload to PyPI - ${{ matrix.os.name }} ${{ matrix.python.major-dot-minor }} ${{ matrix.arch.name }}	0s
	1h 24m 23s

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