CI: Extend BuildRunTests() to accept configurable dockerfile and test options

- enable configurable dockerfile, runtime-opt, and ctest-opt parameters in
  the XML file for the Build_Run_Tests step
- pass runtime options to `docker run` to support ctest execution with CUDA
- allow additional ctest options for selective test execution and labeling

ci-scripts/xml_files/container_build_run_tests.xml

@@ -8,6 +8,7 @@
   <testCase>
     <class>Build_Run_Tests</class>
     <desc>Build and Run UnitTests</desc>
+    <dockerfile>docker/Dockerfile.unittest.ubuntu</dockerfile>
     <node>obelix</node>
   </testCase>