feat(NODE-6245): add keepAliveInitialDelay config

[durran]

Description

Brings back the keepAliveInitialDelay option.

What is changing?

• Adds keepAliveInitialDelay as an option to pass to the socket.
• Removed the explicit calls to setKeepAlive and setNoDelay
• Defaults now to 120 seconds instead of 300

Is there new documentation needed for these changes?

Yes, driver docs.

What is the motivation for this change?

NODE-6245

Release Highlight

keepAliveInitialDelay may now be configured at the MongoClient level

When not present will default to 120 seconds. The option value must be specified in milliseconds.

import { MongoClient } from 'mongodb';

const client = new MongoClient(process.env.MONGODB_URI, { keepAliveInitialDelay: 100000 });

Double check the following

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

[nbbeeken]

Capturing from our meeting: we want to get the keepAlive related options into the "options" argument we pass into tls/net .connect() and move off of calling the setKeepAlive and noDelay functions so that we are just passing Node.js configurations through to Node.js without our own validation or opinionated handling.

KeepAlive will still always be enabled and not configurable.

[nbbeeken]

LGTM

[nbbeeken]

LGTM (I'll get a ping when the CI finishes)

[durran]

Failures look all like the FLE bad uri test that has the slack thread.