Squish: Redo running test cases

Start allowing interactions with the AUT which enables
interrupting and debugging the test cases.
Use a debugger perspective for interaction and provide
a control bar which is visible while running test cases.

Change-Id: I2c9fde51263516c38e814c91241d3ed3489ecacb
Reviewed-by: David Schulz <david.schulz@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/squish/squishsettings.h

@@ -28,6 +28,7 @@ public:
     Utils::IntegerAspect serverPort;
     Utils::BoolAspect local;
     Utils::BoolAspect verbose;
+    Utils::BoolAspect minimizeIDE;
 };
 
 class SquishSettingsPage final : public Core::IOptionsPage