Use `clSetKernelArg` to set args after kernel is cloned. Enqueue and
  read the buffer to validate.
  The test uses `buf_write_kernel` kernel program with 2 arguments.

* In test_clone_kernel, if `clEnqueueReadBuffer` was a success then
  the error code would be `CL_SUCCESS`, which will not print the error
  message when buffer validation fails, therefore replace with
  `test_assert_error` to print the error message.

* Add test coverage for `clCloneKernel` with Execinfo
  Use `clSetKernelExecInfo` after kernel is cloned and read the buffer
  to validate. The test uses the `set_kernel_exec_info_kernel` kernel program
  with 2 arguments.

* Add test covergae for `clCloneKernel` with no args
  Clone a kernel with no args and enqueue.
  The test uses `test_kernel_empty` kernel program with no arguments.

* Add test coverge for `clCloneKernel` with SVM pointer
  Use `clSetKernelArgSVMPointer` to set args after kernel is cloned.
  Enqueue and read the buffer to validate.The test uses `buf_write_kernel`
  kernel program with 2 arguments.

Signed-off-by: Vikas Katariya <vikas.katariya@arm.com>

Signed-off-by: John Kesapides <john.kesapides@arm.com>