[devops] 🐌 Slow CircleCI build times

[thisislawatts]

Describe the bug

The dependency installation process runs for 1-2mins at multiple stages within the deployment pipeline. This unnecessarily slows down the feedback cycle and wastes a bunch of compute time. This is bad for the planet and developers.

To Reproduce

1. Take a look at any of the build pipelines.
2. Check one of the jobs, ie. Unit tests
3. See that install dependencies has run for a few minutes or more.

Expected behaviour Dependency installation should run only run twice (once for all dev dependencies and again for production dependencies)