Debugger: Merge debug mode and analyze mode

On the user-visible side, only the 'Analyze' mode button disappears,
and instead a combobox to switch between different tools in appears
in the Debug mode toolbar.

Internally, that's quite some re-organzition: The centralized
'Analyze mode is busy' flag is gone, allowing us to run e.g.
ClangStaticAnalyzer and MemCheck in parallel.

Analyzer tools and debugger now share the same mechanism to
generate/load/save dock widgets.

Analyzer tools now create and handle their own start/stop button
when appropriate. In general, Analyzer tools can create/handle more
than one run control at a time.

Further consolidation is possible, e.g. RunControl state handling
could be merged into the base ProjectExplorer::RunControl to
avoid the still existing duplication in ~15 instances.

Change-Id: I91e5940ebc4211f98056d507cf2f7b5f8efe7f07
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/clangstaticanalyzer/clangstaticanalyzerdiagnosticview.cpp

@@ -36,13 +36,13 @@
 #include <QAction>
 #include <QDebug>
 
-using namespace Analyzer;
+using namespace Debugger;
 
 namespace ClangStaticAnalyzer {
 namespace Internal {
 
 ClangStaticAnalyzerDiagnosticView::ClangStaticAnalyzerDiagnosticView(QWidget *parent)
-    : Analyzer::DetailedErrorView(parent)
+    : Debugger::DetailedErrorView(parent)
 {
     m_suppressAction = new QAction(tr("Suppress this diagnostic"), this);
     connect(m_suppressAction, &QAction::triggered, [this](bool) { suppressCurrentDiagnostic(); });