Support workspace aware cache keys in Twig loader [#3295912]

Problem/Motivation

When creating a component override using this module in combination with the wse_config module (submodule of wse) inside a workspace, the overrides are currently leaking into other workspaces and into the live version of the site.

Steps to reproduce

On Vanilla Drupal 9

Enable the wse_config and component_library modules
Switch to the stage workspace
Create an override for the page title template
Switch to the live workspace

Result: The change done in the stage workspace is leaking into the live version of the site.

Proposed resolution

In Drupal\component_library\Twig\Loader::getCacheKey() detect a possibly active workspace and suffix the returned cache key with the workspace id.

Issue fork component_library-3295912

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3295912-workspace-cache-keys changes, plain diff MR !9
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