[codegen] Update API Resources

[ob-stripe]

r? @-stripe (feel free to change reviewer)
cc @stripe/api-libraries

• Sanity check for correctness.
• Ensure appropriate test coverage (ie; write tests).

[ob-stripe]

@rattrayalex-stripe I opened this PR to sanity-check against the one manually written by @remi-stripe (#608) and test the codegen flow.

Issue with the generated code itself:

• I'm not sure about this balanceTransactions() methods -- I think we should only have listBalanceTransactions(), like we only have e.g. listTaxIds.

Issues with the codegen flow:

• the r? tag is missing the actual reviewer's name
• would be great if the script printed a link to the newly created PR

(Closing this PR to avoid confusion since I'm going to merge the other one.)

[rattrayalex-stripe]

Ah, great, I think there was some confusion about whether things like balanceTransactions were a happy path or not. Realistically I won't get to it this week so filed https://jira.corp.stripe.com/browse/DX-4236

will fix the primary_reviewer bug in my current PR, and also add the output PR