[task]: Update TaskConfigurationManager on Workspace Location Change

[colin-grant-work]

Signed-off-by: Colin Grant colin.grant@ericsson.com

What it does

Fixes #9329 by adding a listener for onLocationChanged to the TaskConfigurationManager to ensure that it updates the target of its workspace proxy when a workspace file is created.

In addition, it fires a changed event when the workspace proxy is changed, parallel to the events fired when new folder-scope models are created.

How to test

1. Checkout this PR branch.
2. Cherry pick the commit from this branch to add a command to log what the configuration service lists in workspace scope. (ctrl+p, search 'Check tasks listed in workspace scope.')
3. Open a single-root, unsaved workspace.
4. If there are no tasks in the root, add one, e.g.

{
  "version": "2.0.0",
  "tasks": [
    {"label": "Folder task", "type": "shell", "command": "htop"}
  ]
}

5. Run the command to log tasks in workspace scope.
6. See that the tasks in the folder scope are logged (since folder scope = workspace scope)
7. Run File > Save Workspace as ... and save the workspace wherever you'd like.
8. Run the command to log tasks in workspace scope.
9. See that the tasks in folder scope are not logged, since folder scope != workspace scope after saving the workspace file.

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

[kenneth-marut-work]

Tested and working 👍