Fix cleanup in multi-worker envs (DAS project)

[d4vidi]

Description

DAS = Device Allocation Server

A rearchitecture of Detox' device allocation concern. In a nutshell - we want to have that concern either implemented as a global-scope managed server, or integrated into the existing Detox-server itself*.

The issue address the 1st phase in what could be an inception of further future improvements. It's scope is (roughly):

• Make existing Detox server managed at global scope (rather than having distinct servers bootstrapped and killed over and over again based on workers' lifecycles).
• Setting up this kind of a server at global-scope (either as an independent entity, or bundled into the existing Detox server). It will strictly be running at local host, for the time being, so as to avoid adding this up into a bigger, hard-to-manage change.
• De-facto activating the server...

(@noomorph this is what I had in mind, obviously you're the one to decide the best way to move forward!)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.
If you believe the issue is still relevant, please test on the latest Detox and report back.

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