fix(client): fix transactions mode being reversed

[jimmyjames]

Description

⚠️ This is a behavioral breaking change!

Currently the OpenFgaClient reverses the behavior of write transactions based on the disableTransactions flag. This PR fixes that, only sending batched write requests if disableTransactions == true.

This is a functional breaking change, since the value of disableTransactions was being used incorrectly, so now disableTransactions == true will actually batch requests, and disableTransactions == false will send one (transactional) request.

References

• Generated from fix(java-sdk): fix transactions mode being reversed sdk-generator#321
• Fixes In the client, the transaction modes are flipped #59

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected