Analyzer: Slim down AnalyzerStartParameters

* SysRoot can always be determined from kit.
* Pass around RunMode as extra parameter
  not as part of AnalyzerStartParameters.
  That's closer to the pattern used elsewhere.
* Environment was always initialized from the runconfig's
  EnvironmentAspect. The tools can do that directly.
* Provide setter for display name for cases where
  it is not equal to RunConfiguration::displayName

Change-Id: I811a0d7cdeb55cc37a16a593b3942abb567a2150
Reviewed-by: BogDan Vatra <bogdan@kdab.com>
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>

src/plugins/qmlprofiler/qmlprofilerplugin.cpp

@@ -60,7 +60,7 @@ bool QmlProfilerPlugin::initialize(const QStringList &arguments, QString *errorS
     auto tool = new QmlProfilerTool(this);
     auto widgetCreator = [tool] { return tool->createWidgets(); };
     auto runControlCreator = [tool](const AnalyzerStartParameters &sp,
-        ProjectExplorer::RunConfiguration *runConfiguration) {
+        ProjectExplorer::RunConfiguration *runConfiguration, Core::Id) {
         return tool->createRunControl(sp, runConfiguration);
     };