Improve test coverage for dpctl_sycl_queue_interface

[diptorupd]

Improvements to dpctl_c_api

• Add missing checks to dpctl_sycl_queue_interface.cpp
• Add error messages to dpctl_sycl_program_interface.cpp inside the level-zero module creation function.
• Refactor the unit tests for dpctl_sycl_queue_interface.cpp introducing negative test cases.
• Moved the queue submit test cases into a separate source file.

Note - Unit tests for DPCTLQueue_Memcpy and family are not added here. I will be adding them in a separate PR.

[coveralls]

Coverage increased (+1.5%) to 62.29% when pulling 57488e1 on diptorupd:fix/c_api_queue_tests into 227a126 on IntelPython:master.