[SYCL] Make kernel impl non copyable and non movable. (#2050)

This change deletes the copy constructor and move constructor
from the kernel impl classes.

The destructor for the kernel_impl class assumes that the proper constructor is called. 
If the object was created using a default copy constructor, it would call the destructor which expected the complementary PI_CALL in the constructor.

Signed-off-by: sarathnandu <[email protected]>

Author: sarathnandu

sycl/source/detail/kernel_impl.hpp

@@ -62,6 +62,15 @@ class kernel_impl {
   /// \param ProgramImpl is a valid instance of program_impl
   kernel_impl(ContextImplPtr Context, ProgramImplPtr ProgramImpl);
 
+  // This section means the object is non-movable and non-copyable
+  // There is no need of move and copy constructors in kernel_impl.
+  // If they need to be added, piKernelRetain method for MKernel
+  // should be present.
+  kernel_impl(const kernel_impl &) = delete;
+  kernel_impl(kernel_impl &&) = delete;
+  kernel_impl &operator=(const kernel_impl &) = delete;
+  kernel_impl &operator=(kernel_impl &&) = delete;
+
   ~kernel_impl();
 
   /// Gets a valid OpenCL kernel handle