feat(NODE-6275): Add CSOT support to GridFS

[W-A-James]

Description

What is changing?

GridFSUploadStream

• Add CSOT support by piping TimeoutContext down through all operations over lifetime of GridFSUploadStream
• Migrate checkIndexes call from constructor to async construct() method to accomodate CSOT error handling

GridFSDownloadStream

• Add CSOT support by piping TimeoutContext down through all operations over lifetime of GridFSDownloadStream

GridFSBucket

• Add support for timeoutMS option to:
  • GridFSBucket.openUploadStream()
  • GridFSBucket.openUploadStreamWithId()
  • GridFSBucket.openDownloadStream()
  • GridFSBucket.openDownloadStreamByName()
  • GridFSBucket.find()
  • GridFSBucket.drop()
  • GridFSBucket.rename()
  • GridFSBucket.delete()

Testing

• Unskip CSOT gridfs spec tests
• Implement Prose test 6 and 7
• Add int tests that verify that non-spec-required methods (GridFSBucket.openUploadStreamWithId() and GridFSBucket.openDownloadStreamByName()) properly handle timeoutMS
• Add int test verifying that 'index' event is emitted exactly once by GridFSBucket when creating upload streams

Is there new documentation needed for these changes?

Yes, punt to NODE-5688, also see NODE-6275 for specifics.

What is the motivation for this change?

NODE-6275

Release Highlight

Double check the following

• [X] Ran npm run check:lint script
• [X] Self-review completed using the steps outlined here
• [X] PR title follows the correct format: type(NODE-xxxx)[!]: description
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• [X] Changes are covered by tests
• [ ] New TODOs have a related JIRA ticket

[W-A-James]

Note, tests currently failing since mongodb-legacy does not currently pass through the options for some methods that now have an options argument, being addressed here

[W-A-James]

Re the question about leaking cursors on the server, you're right, it's not a new question for CSOT, but thought it might still be good to flag it here. Not sure if there's anything we want to or can do about it rn.