[UR][HIP] Fix narrowing conversion of ur_context_info_t

Converting ur_context_info_t (int32_t) to uint32_t was a narrowing
conversion and it was making Visual Studio compiler error out during
compilation.

Author: ph0b

unified-runtime/source/adapters/hip/context.cpp

@@ -61,7 +61,7 @@ urContextGetInfo(ur_context_handle_t hContext, ur_context_info_t propName,
 
   UrReturnHelper ReturnValue(propSize, pPropValue, pPropSizeRet);
 
-  switch (uint32_t{propName}) {
+  switch (propName) {
   case UR_CONTEXT_INFO_NUM_DEVICES:
     return ReturnValue(static_cast<uint32_t>(hContext->Devices.size()));
   case UR_CONTEXT_INFO_DEVICES: