fix(client): Correctly report error location in batch transaction

[SevInf]

Engine PR: prisma/prisma-engines#3384

Uses newly added batch_request_idx property of an errors to identify
and correctly report error location within a batch.

Fix #15433
Fix #14373

[SevInf]

@millsp @aqrln I'd ask for another re-review here. I had to rewrite waitForBatch function to be closer to how Promise.all behaves and reject early on all non-batch errors. This is necessary, because if one of the batch requests fails early, with, for example, validation error, batch will not be executed at all and remaining promises won't settle. Promise.all rejected batch promise correctly in this case, older waitForBatch, based on Promise.allSetlled did not. Now it fixed, with unfortunate downside of a more complicated code.

[aqrln]

Amazing work!