QDS-11960 Create testing infrastructure for x86_64

This MR brings the following features;

• Add testing stages for the x86_64 arch into the CI
• Create required testing infrastructure

cicd/docker/Dockerfile

 FROM git.qt.io:4567/design-studio/maintenance/docker-images/qt-full:6.6.1
 
+ENV ANDROID_SDK_ROOT=/opt/android
+ENV PATH=$PATH:${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin/
+ENV PATH=$PATH:${ANDROID_SDK_ROOT}/emulator
+ENV PATH=$PATH:${ANDROID_SDK_ROOT}/platform-tools
+
 RUN bash <<EOF
 apt update
-
-export ANDROID_SDK_ROOT=/opt/android
-export PATH=$PATH:${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin/
-export PATH=$PATH:${ANDROID_SDK_ROOT}/emulator
-export PATH=$PATH:${ANDROID_SDK_ROOT}/platform-tools
-
 cd ${ANDROID_SDK_ROOT}
+ls -l
+echo "current directory: $(pwd)"
 
 wget -O cmdline-tools.zip https://dl.google.com/android/repository/commandlinetools-linux-10406996_latest.zip
 unzip cmdline-tools.zip