Qnx: Mark new debuggers from setup dialog as not autodetected

And use the right device for its base environment.

Change-Id: Ida6d9c5dd88b766659311f4eacca8ced3c5531cd
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/qnx/qnxconfiguration.cpp

@@ -217,13 +217,12 @@ void QnxConfiguration::createTools(const Target &target)
 
 QVariant QnxConfiguration::createDebugger(const Target &target)
 {
-    Utils::Environment sysEnv = Utils::Environment::systemEnvironment();
+    Environment sysEnv = m_qnxHost.deviceEnvironment();
     sysEnv.modify(qnxEnvironmentItems());
 
     Debugger::DebuggerItem debugger;
     debugger.setCommand(target.m_debuggerPath);
     debugger.reinitializeFromFile(nullptr, &sysEnv);
-    debugger.setAutoDetected(true);
     debugger.setUnexpandedDisplayName(Tr::tr("Debugger for %1 (%2)")
                 .arg(displayName())
                 .arg(target.shortDescription()));