Add worst case contract tests

[pinkiebell]

• Add worst case contract bytecodes
• Also includes minor changes to the halo2 fork that improves proofing time. Part of #111

[coveralls]

Pull Request Test Coverage Report for Build 3675180218

• 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 90.086%

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Totals
Change from base Build 3664306244:	0.0%
Covered Lines:	836
Relevant Lines:	928

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💛 - Coveralls