Utils: Use CommandLine in ShellCommand

... and adapt users.

Change-Id: I218523ffe34720d5fe199aa0ca6892a8dc2985fc
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/clearcase/clearcaseplugin.cpp

@@ -1452,8 +1452,9 @@ ClearCasePlugin::runCleartool(const QString &workingDir,
     }
 
     const SynchronousProcessResponse sp_resp =
-            VcsBasePlugin::runVcs(workingDir, FilePath::fromUserInput(executable),
-                                  arguments, timeOutS,
+            VcsBasePlugin::runVcs(workingDir,
+                                  {FilePath::fromUserInput(executable), arguments},
+                                  timeOutS,
                                   flags, outputCodec);
 
     response.error = sp_resp.result != SynchronousProcessResponse::Finished;