move tests into a test module in get_puzzle_and_solution_for_coin.rs

[arvidn]

this is best reviewed with whitespaces ignored.
https://github.com/Chia-Network/chia_rs/pull/642/files?diff=split&w=1

[coveralls-official]

Pull Request Test Coverage Report for Build 10252082124

Details

• 121 of 123 (98.37%) changed or added relevant lines in 1 file are covered.
• 563 unchanged lines in 16 files lost coverage.
• Overall coverage decreased (-1.8%) to 78.946%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
crates/chia-consensus/src/gen/get_puzzle_and_solution.rs	121	123	98.37%

Files with Coverage Reduction	New Missed Lines	%
crates/chia-consensus/src/gen/run_puzzle.rs	1	98.31%
crates/chia-traits/src/streamable.rs	1	94.03%
crates/chia-consensus/src/gen/run_block_generator.rs	2	95.42%
crates/chia-consensus/src/gen/validation_error.rs	4	24.19%
crates/chia-consensus/src/gen/conditions.rs	5	99.26%
crates/chia-protocol/src/lazy_node.rs	9	64.0%
wheel/src/run_program.rs	11	68.57%
crates/chia-protocol/src/spend_bundle.rs	13	75.97%
crates/chia-traits/src/to_json_dict.rs	24	11.11%
crates/chia-traits/src/from_json_dict.rs	27	8.33%

Totals
Change from base Build 10249879023:	-1.8%
Covered Lines:	11114
Relevant Lines:	14078

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💛 - Coveralls