Regex decoding error tests in top.json have unexpected, invalid syntax

Summary

Two decodeErrors tests in top.json incorrectly use $options as a field within $regularExpression. That causes a parsing error, which can interfere with the actual error being expected by the test (using a number instead of a string for pattern or options). This error dates back to mongodb/specifications@c6d7ac8.

Motivation

Who is the affected end user?

Driver test suites may not be properly testing expected types for $regularExpression syntax in Extended JSON.

Is this issue urgent?

No.

Is this ticket required by a downstream team?

No.

Is this ticket only for tests?

Yes.