Make the active flags FALSE by default

[thekaveman]

We saw an issue where a race condition between the app code being deployed but new secrets/app settings not ready yet, and SBMTD was showing as an active agency briefly.

Acceptance Criteria

Each of these lines uses False by default

• https://github.com/cal-itp/benefits/blob/dev/benefits/core/migrations/0002_data.py#L181
• https://github.com/cal-itp/benefits/blob/dev/benefits/core/migrations/0002_data.py#L312
• https://github.com/cal-itp/benefits/blob/dev/benefits/core/migrations/0002_data.py#L332

[thekaveman]

In testing this with a PR (see #1746) it became clear that our UI / Cypress tests are dependent on the default values being True.

This should be changed wholesale as we look to implement an Admin/Config interface, where our tests could run against a true sample agency CST, and we'll have an easier time flipping real agencies on/off.

Closing for now as we've moved passed the initial issue and have the False values configured in each environment.