Azure Speech Service API error handling

[maddiedierker]

This PR is a pure refactor with improvements in how we handle errors from Azure's Speech Service API (aka Cognitive Services).

Specifically, an influx of this Honeybadger error has occurred twice in the past ~3 months and has caused Applab and Gamelab projects to return 500s on load (more in the COE below).

Improvements in this PR:

• Rescue errors gracefully for both API Requests to the Speech Service
• Log any errors to Honeybadger
• Adds a Gatekeeper flag so we can turn off all requests to the Speech Service without a deploy
• Lowers the HTTP request timeouts from the default (60s) to a configurable DCDO flag (which defaults to 5s)

Links

• COE: Azure token request failure in Applab/Gamelab
• STAR-1219
• Also does some prep work for STAR-1221 and STAR-1299

Testing story

Adds unit tests.

Reviewer Checklist:

• Tests provide adequate coverage
• Privacy and Security impacts have been assessed
• Code is well-commented
• New features are translatable or updates will not break translations
• Relevant documentation has been added or updated
• User impact is well-understood and desirable
• Pull Request is labeled appropriately
• Follow-up work items (including potential tech debt) are tracked and linked

[breville]

Not familiar with the prior code but this looks nice and clean, with some great testing too.