This PR add a possibility to reboot the reboot device, metro and
devtools processes without triggering clean build. It was previously
only possible by closing and reopening the IDE panel itself.

This also will provide necessary functionality for  #663

### How Has This Been Tested: 

- run an application and pick "Reboot IDE" option from reload dropdown
menu

This PR changes a way we manage build caches. Previous approach was
dependent on current vscode workspace, which led to build caches not
being accessible when switching from working in the root of the
workspace to the root of the application (or doing the same in reverse).
The new approach saves this data in global storage, and adds a appRoot
identifier to the cache key.

This PR is a dependency for #663

### How Has This Been Tested: 

- Open a project in the root of the workspace and run some application
that is part of it in the IDE.
- Open IDE in the root of that application and see if the build cache is
loaded.
- repeat the proces in reverse
- open an application that had a build made before this change and check
if migration process works as expected

Verify that the build cache migration work:
- Build project without these changes
- Open the same project with no changes but with the new version of
extension – expect the cache hit for native build

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Co-authored-by: Krzysztof Magiera <[email protected]>