Introduce modern context provider and hooks (PP-1572)

[tdilauro]

Description

Adds context hooks for many of the properties provided by the current, legacy context provider in the ContextProvider component. With this change, the ContextProvider component injects a provider for the new AppContext into the component tree, so we don't need to account for another component in the app tree or in test wrappers.

Motivation and Context

• Provide a migration path away from legacy context provider.
• Make it easier to write some business logic hooks.

[Jira PP-1572]

How Has This Been Tested?

• Manually tested locally with the dev-server.
• New and existing tests pass locally. Existing tests did not need to be modified.
• CI tests for associated branch passed.

Checklist:

• N/A - I have updated the documentation accordingly.
• All new and existing tests passed.

[ray-lee]

🚀 This looks like a good way to migrate to modern context.