refactors

[arvidn]

these commits are best reviewed one at a time. They are mostly unrelated other than factoring out common code into functions.

1. Preparing the arguments passed into a block generator was pulled out into setup_generator_args(). It was also made more generic to accept any iterator of block refs, rather than a slice of block refs.
2. extracting a slice from a python buffer was factored out into py_to_slice() function. it panics if the buffer isn't contiguous (which they should all be).
3. Some error handling was simplified in run_chia_program() and get_puzzle_and_solution() allowing some old code to be removed.

[coveralls-official]

Pull Request Test Coverage Report for Build 10163544102

Details

• 79 of 108 (73.15%) changed or added relevant lines in 4 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+4.1%) to 82.751%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
wheel/src/run_generator.rs	40	50	80.0%
wheel/src/api.rs	2	21	9.52%

Files with Coverage Reduction	New Missed Lines	%
wheel/src/api.rs	1	78.27%

Totals
Change from base Build 10148199606:	4.1%
Covered Lines:	11667
Relevant Lines:	14099

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💛 - Coveralls