Change DB urls/secrets to `postgresql`

[Swatinem]

The various database_url settings are consumed via GCP secrets:

https://github.com/codecov/k8s-v2/blob/cb63c4ed98bde7bb2d22d8f6d3ae6564fa5aa83d/charts/codecovWorker/conf/env.yaml#L55-L61

For example, sm://codecov-dev/codecov_staging_db_url_celery.

Some (most?) of these secrets currently begin with postgres://, but this is blocking an upgrade of the sqlalchemy dependency which switched to postgresql:// and has removed backwards compatibility support in v 1.4.0.

For that reason, I would like to switch over those secrets to postgresql://.

Lets start with staging first, and verify that both older and newer versions of the dependency handle that prefix correctly, before also rolling that change out to production and DEC.

[tnt-sentry]

@Swatinem I "solved" this in shelter

Doing something like that for the rollout will help us avoid issues where we change the secret but the old code is picking it up. Then after rollout we can change the secret and remove the code.

[matt-codecov]

Then after rollout we can change the secret and remove the code.

trent-codecov committed on Oct 25, 2023

:^)

[tnt-sentry]

Well to be fair, I couldn't update the secret for Shelter until we upgraded main Codecov. This would do that.

[drazisil-codecov]

https://github.com/codecov/terraform/pull/1503