[CORL-3195]: more error handling and type check fixes

[kabeaty]

What does this PR do?

These changes:

• Make sure that we're checking that a tenant has media and gifs defined before checking that it is enabled/supported. This was throwing errors when gifs wasn't defined.
• Because non-error exception volume increased after Tenor option was introduced, attempt to check type of new error caught and thrown within these changes, and update what's thrown if it is not an instance of Error.

Also, if after these changes we are still seeing issues with non-error exceptions being thrown, we can add a check in services/errors/sentry for instance of Error and handle accordingly. I kept out of these changes to try one step at a time.

These changes will impact:

• 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?

n/a

How do I test this PR?

Check that comments with Tenor gifs still work as expected.

Were any tests migrated to React Testing Library?

How do we deploy this PR?

[netlify]

✅ Deploy Preview for gallant-galileo-14878c canceled.

Name	Link
🔨 Latest commit	d492591
🔍 Latest deploy log	https://app.netlify.com/sites/gallant-galileo-14878c/deploys/6706cded67e72900084e6266

[nick-funk]

This looks good to me!