[TODO] Team's Iteration16 TODO preparation

[Olshansk]

Go through ALMOST all the TODOs and and to the following:

• Add an owner where applicable
• Mark things as TODO_BLOCKER if they need to be done in iteration #16
• Mark things as TODO_BETA if they are needed for the beta launch
• Mark things as TODO_MAINNET if they are needed for mainnet

This enables generating a TODO list like so:

grep -r "TODO_BLOCKER(@Olshansk)" . | sed 's/^/- [ ] `/' | sed 's/:/`:/'

[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 577)) Grafana network dashboard for devnet-issue-{issue-id}