DeviceProcess: Minimize the usage of DeviceProcess

DeviceProcess doesn't provide any public API, so
replace all usages of it with QtcProcess.
Keep using DeviceProcess only for reimplementations.

Change-Id: I35a14251a81dd0dde426f56ca2e809b527cc863c
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/mesonprojectmanager/project/mesonprocess.cpp

@@ -33,6 +33,7 @@
 #include <projectexplorer/projectexplorerconstants.h>
 #include <projectexplorer/taskhub.h>
 
+#include <utils/qtcprocess.h>
 #include <utils/stringutils.h>
 
 #include <QLoggingCategory>

src/plugins/mesonprojectmanager/project/mesonprocess.h

@@ -27,9 +27,6 @@
 
 #include "exewrappers/mesonwrapper.h"
 
-#include <utils/qtcprocess.h>
-
-#include <QBuffer>
 #include <QByteArray>
 #include <QElapsedTimer>
 #include <QFutureInterface>
@@ -39,6 +36,8 @@
 
 #include <memory>
 
+namespace Utils { class QtcProcess; }
+
 namespace MesonProjectManager {
 namespace Internal {