[Test Utils] Minor developer experience test improvements

[Olshansk]

Summary

Minor testing development environment improvements while going through the code:

• More comments
• Added .env.dev for sourcing
• Added an E2E test so make test_e2e_params is idempotent
• Added additional warning messages when running a local stress test
• Added a makefile catch all

Type of change

Select one or more:

• [ ] New feature, functionality or library
• [ ] Bug fix
• [x] Code health or cleanup
• [ ] Documentation
• [ ] Other (specify)

Testing

• [ ] Unit Tests: make go_develop_and_test
• [ ] LocalNet E2E Tests: make test_e2e
• [ ] DevNet E2E Tests: Add the devnet-test-e2e label to the PR.

[github-actions[bot]]

The CI will now also run the e2e tests on devnet, which increases the time it takes to complete all CI checks.

You may need to run make trigger_ci to submit an empty commit that'll trigger the tests.

GCP workloads (requires changing the namespace to 574)) Grafana network dashboard for devnet-issue-{issue-id}

[github-actions[bot]]

The image is going to be pushed after the next commit.

You can use make trigger_ci to push an empty commit.

If you also want to run E2E tests, please add devnet-test-e2e label.

[red-0ne]

Pushed a couple of changes about go_test -> test_all in CI workflow and a reference to go_test in the quickstart documentation.

[Olshansk]

@bryanchriswhite Appreciate the post-merge review. PTAL at the comments I posted in #571.