chore(NODE-6268): update dev dependencies and add dependabot config

[baileympearson]

Description

What is changing?

This is a pretty "large" PR - large in terms of files changed, not large in terms of actual substantial changes. This PR

• performs the quarterly dependency upgrade
• upgrades to eslint v9, upgrades all other eslint-related packages to their eslint-v9 corresponding versions and fixes all the issues that arose
• upgrades prettier to 3.x (necessary for compatibility with eslint v9 and eslint-plugin-prettier), which results in a minor reformatting of the codebase
• adds a dependabot config for future dependency upgrades

I've tried to comment on any substantial changes made as a result of the eslint upgrade (spoiler: there aren't many).

Is there new documentation needed for these changes?

No.

What is the motivation for this change?

Release Highlight

Fill in title or leave empty for no highlight

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]

LGTM, the no-then removals seem to have left empty lines that I would've expected prettier to clean up, fine to leave as is but mentioning if you didn't notice