Make integration tests more extensible

[zhongeric]

There's a ton of duplicated code in the integration tests that we should remove. This will make the addition of new quote types much easier

Diff is kind of messy from yarn fix but essentially:

• Created new BaseIntegrationTestSuite class that internalizes helper functions like checking quote tokens, execution, etc. As well as having default setup logic
• In classic and uniswapx tests we run the base class setup and call base class methods when applicable

[ConjunctiveNormalForm]

this this sick, thanks for the change!!