Utils: Move QtcProcess constructor setup data to shared setup data

This includes replacing DeviceProcess terminal handling with base
member.

Change-Id: Id1541bfce33c71dddc71b4816ad0b174dce3879c
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/debugger/cdb/cdbengine.cpp

@@ -182,9 +182,10 @@ void addCdbOptionPages(QList<Core::IOptionsPage *> *opts)
 
 CdbEngine::CdbEngine() :
     m_tokenPrefix("<token>"),
-    m_process(ProcessMode::Writer),
     m_extensionCommandPrefix("!" QT_CREATOR_CDB_EXT ".")
 {
+    m_process.setProcessMode(ProcessMode::Writer);
+
     setObjectName("CdbEngine");
     setDebuggerName("CDB");