Test failure: vscode.workspace.getWorkspaceFolder(file)` don\'t return workspace folder when file open from command line

[bpasero]

This test started to fail on Windows from master recently. I think some of the green checks from the commit history are not valid because they do not contain a VSCode build.

 1) ExtHostWorkspace `vscode.workspace.getWorkspaceFolder(file)` don't return workspace folder when file open from command line. #36221:
     TypeError: call.getFileName is not a function
      at getErrMessage (assert.js:270:25)
      at innerOk (assert.js:361:17)
      at Function.ok (assert.js:381:3)
      at Context.<anonymous> (file:///C:/GitDevelopment/monaco/out/vs/workbench/test/browser/api/extHostWorkspace.test.js:471:24)