BareMetal: Some consolidation of RunConfiguration related classes

Purely mechanical, no visible/functional changes intended or expected.

- have one file pair for each set of config/factory/widget
- de-pimpl BareMetalRunConfigWidget, it's very local now
- use new wrapWidget convenience function for run config widget setup

Change-Id: Icd0df2bc7e206d6bf15d722f7eaa3b9fbee0b0fa
Reviewed-by: Alexander Drozdov <adrozdoff@gmail.com>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/baremetal/baremetalplugin.cpp

@@ -26,10 +26,10 @@
 
 #include "baremetalplugin.h"
 #include "baremetalconstants.h"
+#include "baremetalcustomrunconfiguration.h"
 #include "baremetaldeviceconfigurationfactory.h"
 #include "baremetaldebugsupport.h"
 #include "baremetalrunconfiguration.h"
-#include "baremetalrunconfigurationfactory.h"
 
 #include "gdbserverproviderssettingspage.h"
 #include "gdbserverprovidermanager.h"