The drivers ticket DRIVERS-1293 updated a lot of specs, but because it was split into epics and not individual tickets, the downstream changes didn't get captured explicitly in the language tickets, and it looks like we didn't really apply all the changes from all the related commits, of which there were quite a number. The explicit ones we are missing were in spec repo PRs #973 and #974, so we should sync those. The affected files in our repository are as follows:

#973
test/spec/transactions/legacy/error-labels
test/spec/transactions/legacy/retryable-abort
test/spec/transactions/legacy/retryable-commit
-> also adds "hello" to pin-mongos
test/spec/transactions/convenient-api/commit-retry

#974
test/spec/retryable-writes/insertOne-serverErrors
-> also needs to move into legacy subdirectory