* fix #114416 LabelService.getUriLabel bad relative path if in root workspace
First commit is just a new test to show the problem.
Second commit will be the fix.

* Push the fix for #114416

* Potential new formatter for userdata in serverless.
Fixes #114234.

* Move userData formatter to userDataInit
Allow `priority` for fomratters without authorities

* Move formatting to web.main.ts

* Remove priority

This reverts commit d03490f3.

* Change labels of URI's in multi-root workspaces to be
[RootName] • [Path From RootPaath to File]
rather than
[RootName] • [basename RootPath]/[Path From RootPath to File]
in cases where the root has an explicit name and
[RootName] • [Path From RootName to File]
in cases where the root's name is defaulted to basename

* Fixup cases where context added after path.
(07339824)

* Remove unused

* Additional test case

For example:
"formatting": {
  "label": "github.com${path} (${authority})",
  "separator": "/",
  "workspaceSuffix": "GitHub"
}

_serviceBrand is only used for typing and should not result in emit

Also adds readonly

#94506