Describe optimization parameters in docs (backport #615)

[mergify[bot]]

Add explanation for the fields in OptimizationParameters, in particular max_gamma and max_backjumps.

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This is an automatic backport of pull request #615 done by Mergify.

[mergify[bot]]

Cherry-pick of d6a865470a3025c950b0938be40e4b3cb98b9ab3 has failed:

On branch mergify/bp/stable/0.7/pr-615
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    both modified:   circuit_knitting/cutting/automated_cut_finding.py

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[coveralls]

Pull Request Test Coverage Report for Build 9491889782

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.468%

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Totals
Change from base Build 9351119670:	0.0%
Covered Lines:	3497
Relevant Lines:	3663

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💛 - Coveralls