DRIVERS-1571 Retry on different mongos when possible

[comandeo]

Please complete the following before merging:

• [x] Update changelog.
• [x] Make sure there are generated JSON files from the YAML test files - not applicable, no spec tests
• [x] Test changes in at least one language driver.
• [x] Test these changes against all server versions and topologies (including standalone, replica set, sharded clusters, and serverless).

Ruby PoC - https://github.com/mongodb/mongo-ruby-driver/pull/2717 Go PoC - https://github.com/mongodb/mongo-go-driver/pull/1358