RedfishPkg: Redfish functions for REST requests are not fully spec complied

There is no function to send POST request with the
ContentType different from "application\json".
There is no function to send DELETE request with the body.

Cc: Abner Chang <abner.chang@amd.com>
Cc: Nickle Wang <nickle.wang@hpe.com>
Signed-off-by: Igor Kulchytskyy <igork@ami.com>
Reviewed-by: Abner Chang <abner.chang@amd.com>

RedfishPkg/PrivateLibrary/RedfishLib/edk2libredfish/include/redfishService.h

@@ -129,6 +129,14 @@ deleteUriFromService (
   EFI_HTTP_STATUS_CODE  **StatusCode
   );
 
+json_t *
+deleteUriFromServiceEx (
+  redfishService        *service,
+  const char            *uri,
+  const char            *content,
+  EFI_HTTP_STATUS_CODE  **StatusCode
+  );
+
 redfishPayload *
 getRedfishServiceRoot (
   redfishService        *service,