Use standard dai/usdc for e2e

[EndymionJkb]

Description

This uses token1/2 and has a custom sort. I wondered if there was a reason to do this vs. just using dai/usdc and the common sort like other tests, and there doesn't seem to be.

Merge into #801 if I'm not missing something.

Type of change

• [ ] Bug fix
• [ ] New feature
• [ ] Breaking change
• [ ] Dependency changes
• [X] Code refactor / cleanup
• [ ] Optimization: [ ] gas / [ ] bytecode
• [ ] Documentation or wording changes
• [ ] Other

Checklist:

• [X] The diff is legible and has no extraneous changes
• [N/A] Complex code has been commented, including external interfaces
• [ ] Tests have 100% code coverage
• [X] The base branch is either main, or there's a description of how to merge

Issue Resolution

[joaobrunoah]

Hey @EndymionJkb ! Since the idea is that this is a base test for other tests, and could be extended to fork tests too with small adjustments, I thought it'd be better to don't use dai/usdc directly here, and use variables for the tokens instead. But I'll use tokenA/tokenB instead of the numbers, as you suggested in the other PR.

[EndymionJkb]

Primary PR will be modified as described above.