[CORL-3008] when auth token is invalid, clear it and reload the stream

[nick-funk]

What does this PR do?

Makes it so that the stream clears the user's auth token when it is invalid or expired and reloads the stream so they can view comments, log in again, and continue using Coral.

These changes will impact:

• [X] commenters
• [ ] moderators
• [ ] admins
• [ ] developers

What changes to the GraphQL/Database Schema does this PR introduce?

None

Does this PR introduce any new environment variables or feature flags?

No

If any indexes were added, were they added to INDEXES.md?

No new indices

How do I test this PR?

• Start up npm run watch on both server and client
• Login to the stream at http://localhost:8080 with a user account
• Stop the Coral server watch task (shut down the server)
• Delete your coral database in Mongo
• Start up the server with npm run start:development
• Install a new tenant at http://localhost:3000/install
• Stop the server again
• Resume npm run watch for the server
• Navigate to http://localhost:8080
• See that the stream obliterates the coral:v2:accessToken storage key and the stream shows up in the signed out state

Were any tests migrated to React Testing Library?

No

How do we deploy this PR?

No special considerations.

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