This change refactors the following tests to use RAII to clean-up
allocated resources on exit, and adds additional changes as mentioned
below:
- test_arrayreadwrite
- Allow different `cl_mem_flags` to be passed to the test.
- test_bufferreadwriterect:
- Allow different `cl_mem_flags` to be passed to the test.
- Customisable copy, read and write functions.
- test_buffer_copy
- Fill the destination buffer with `invalid_ptr` instead of `out_ptr` if
created with `CL_MEM_(USE/COPY)_HOST_PTR`.
- test_buffer_partial_copy
- Fill the destination buffer with `invalid_ptr` instead of `out_ptr` if
created with `CL_MEM_(USE/COPY)_HOST_PTR`.
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Signed-off-by: Michael Rizkalla <michael.rizkalla@arm.com>
