MongoDB 4.4 Support

Engineer(s): Varsha Subrahmanyam Reviewer(s): Patrick Meredith (index builds), Matt Chiaravalloti (collection name len), Huan Li (AWS auth) 2020-06-26 Updated target date to 2020-07-10 (+2wks) - IAM auth has been merged - One ticket remains in code review, we're working out js test failures - This will likely be completed before the next 2wk increment for estimates ---- 2020-06-11: Updated target date to 2020-06-26 (+2wks) - Just waiting on CR for final tickets 2020-05-29: Updated target date to 2020-06-12 (+2wks) - Code complete, finishing automated tests for IAM auth  -- Lost a few days to a confusion between placeholder creds in ticket descriptions and actual driver test creds 2020-05-15: Updated target date to 2020-05-29 (+2wks) - We ran into some problems running the js tests against 4.4  -- Long tail of server js-test-related fixes to make  -- Was a blocker for most other tickets in the epic  -- Resolved on Wed, May 13. - IAM auth work in progress. - Last tickets for index builds in code review. - We'll pin to a specific commit that contains all the features we need for now, and bump the driver version whenever go 1.4.0 is released. 2020-05-01: Updated target date to 2020-05-15 (+2wks) - Encountered major issues with the js tests and had to do rewrites of the tests, pushing out the target date. - The test updates were a blocker for testing other tasks within the epic, development work is otherwise moving along as expected. 2020-04-20: On track for target of 2020-05-01 - Started work on new mongodump format and index changes in mongorestore - AWS auth support is ready for work 2020-04-02: Setting initial target date to 2020-05-01 (4 Weeks) - Design in progress, nearing completion  -- AWS and collection name length sections are complete  -- Putting finishing touches on the index build section - A single scope and design are shared between the Tools and Mirror 4.4 support epics - Prioritized ahead of Mirror 4.4 support - Varsha and Evgeni will join the project when execution starts (currently working on non-epic work)