[core] fix(HotkeysProvider): memoize context value

[braeden]

Related to #5178

Checklist

• Includes tests
• Update documentation

Changes proposed in this pull request:

Split out the memoization work from #6643 since it should be very-safe to land.

• Prevent unnecessary renders when the state doesn't change
• The useReducer/useState array isn't stable between renders, otherwise we could just use that directly.

Reviewers should focus on:

Screenshot

[adidahiya]

Memoize hotkeysProvider value

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.

[adidahiya]

good catch, thanks @braeden!