CDRIVER-4806 sync tests for failCommand errorLabels reqs

[jmikola]

https://jira.mongodb.org/browse/CDRIVER-4806

POC for mongodb/specifications#1489

Updates retryable writes prose test 3 to relocate the errorLabels field when configuring a fail point.

Note: with_transaction/callback-retry.json is unrelated but was missed in CDRIVER-2975.

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This is based on #1507

[kevinAlbs]

Commented a possible cause of a test failure in: https://github.com/mongodb/specifications/pull/1489/files#r1443264016

Here is a sample command to test locally:

# Use `MONGOC_JSON_SUBTEST` to select only one test case.
export MONGOC_JSON_SUBTEST="InsertOne succeeds after NotWritablePrimary"
# Use MONGOC_TEST_MONITORING_VERBOSE to log commands and replies
export MONGOC_TEST_MONITORING_VERBOSE=ON
./cmake-build/src/libmongoc/test-libmongoc -d --no-fork --match "/retryable_writes/legacy/insertOne-errorLabels"
# Gets error: `_id: expected 1, got 3`

[jmikola]

@kevinAlbs: This is ready for another look. I added a skip for the unrelated, failing test and opened CDRIVER-4811 to track that.

If this looks good, you can also sign off on mongodb/specifications#1489.

[kevinAlbs]

LGTM with one additional change:

Update the implementation of Retryable Writes Prose Test 3 to account for the moved errorLabels field.

[jmikola]

Update the implementation of Retryable Writes Prose Test 3 to account for the moved errorLabels field.

Thanks for catching that. Just amended the commit and PR description. Will merge after CI completes.