QtcProcess: Limit the inclusion of qtcprocess.h

Move the rest of QtcProcess enums to processenums.h.
Move ExitCodeInterpreter into processenums.h.
Remove superfluous Utils:: prefix.

Change-Id: Iaa596f353d33d6930085a621b114cc15a35caa80
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/plugins/vcsbase/vcsbaseclient.h

@@ -31,7 +31,7 @@
 
 #include <utils/fileutils.h>
 #include <utils/id.h>
-#include <utils/qtcprocess.h>
+#include <utils/processenums.h>
 
 #include <QObject>
 #include <QStringList>
@@ -41,9 +41,12 @@
 
 QT_BEGIN_NAMESPACE
 class QFileInfo;
+class QTextCodec;
 class QToolBar;
 QT_END_NAMESPACE
 
+namespace Utils { class QtcProcess; }
+
 namespace VcsBase {
 
 class VcsCommand;