Make exectutor report deploys to the scheduler

[wouterdb]

On deploy, the executor reports start and end to the server, we want to move this to the scheduler.

It should be feasible by:

1. updating executor to not call deploy_start and deploy_done to the server, but do it in the surrounding Deploy task
2. inline the deploy_start and deploy_done methods into the scheduler
3. strip them to cover only the case at hand (when replacing in-db state with in-memory state, be mindful of recovery behavior)

May interact with #8187 and should not be done in parallel

[wouterdb]

Hey team! Please add your planning poker estimate with Zenhub @arnaudsjs @hlloreda @Hugo-Inmanta @jptrindade