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/cmakeprojectmanager/cmakeprocess.cpp

@@ -32,6 +32,7 @@
 #include <projectexplorer/projectexplorerconstants.h>
 #include <projectexplorer/taskhub.h>
 
+#include <utils/qtcprocess.h>
 #include <utils/stringutils.h>
 
 using namespace Utils;