test_vulkan: don't throw from destructors (#1947)

Only report an error (and include the error code), but don't throw an
exception as that would call `terminate`.  Failure to release
resources is not fatal in other parts of the CTS.

This fixes `-Wterminate` warnings:

  warning: ‘throw’ will always call ‘terminate’ [-Wterminate]
  note: in C++11 destructors default to ‘noexcept’

Signed-off-by: Sven van Haastregt <sven.vanhaastregt@arm.com>

test_conformance/common/vulkan_wrapper/opencl_vulkan_wrapper.cpp

@@ -853,7 +853,7 @@ clExternalImportableSemaphore::~clExternalImportableSemaphore()
  cl_int err = clReleaseSemaphoreKHRptr(m_externalSemaphore);
  if (err != CL_SUCCESS)
  {
- throw std::runtime_error("clReleaseSemaphoreKHR failed!");
+ log_error("clReleaseSemaphoreKHR failed with %d\n", err);
  }
 }
 
@@ -935,7 +935,7 @@ clExternalExportableSemaphore::~clExternalExportableSemaphore()
  cl_int err = clReleaseSemaphoreKHRptr(m_externalSemaphore);
  if (err != CL_SUCCESS)
  {
- throw std::runtime_error("clReleaseSemaphoreKHR failed!");
+ log_error("clReleaseSemaphoreKHR failed with %d\n", err);
  }
 }
 
@@ -1052,4 +1052,4 @@ VulkanImageTiling vkClExternalMemoryHandleTilingAssumption(
  }
 
  return mode;
-}
+}