Upgrade to Redash v10.1.0

[crcastle]

Notes:

• Redash v10 requires a higher plan with more RAM
• Redash v10 also adds another Background Worker service
• Use Render's managed Redis instead of a Docker image

To test an upgrade from v8 to v10 using this PR branch, you must follow a modified version of the Upgrade steps in the README. Instead of step 4, please do the following:

1. For the redash Web Service, redash-scheduler Background Worker, and redash-worker Background Worker, go to Settings and change the Branch to this one: crc/v10.
2. Create a new Background Worker using this repository and the crc/v10 branch. Name it redash-default-worker, and give it the following additional settings
   • An Environment Variable named QUEUES with value periodic emails default
   • An Environment Variable named WORKERS_COUNT with value 1
   • An Environment Variable named REDASH_DATABASE_URL with value set to the internal connection string of your Redash PostgreSQL database
   • An Environment Variable named REDASH_REDIS_URL with the value set to the internal connection string of your Redash Redis instance.
   • Docker Command set to render-redash worker
3. Lastly, click Create Background Worker, then go to the Environment section of the newley created Background Worker (you can do this before it is finished deploying), and link the redash-shared Environment Group to this service.