Call close() from ServletPart.delete()

jetty-core/jetty-http/src/main/java/org/eclipse/jetty/http/MultiPart.java

@@ -435,6 +435,11 @@ public void writeTo(Path path) throws IOException
             }
         }
 
+        /**
+         * This method was initially introduced to implement the corresponding method from servlet spec,
+         * however {@link #close()} should be used instead because it properly releases all associated resources.
+         */
+        @Deprecated(forRemoval = true, since = "12.1.13")
         public void delete() throws IOException
         {
             Path path = getPath();

jetty-ee10/jetty-ee10-servlet/src/main/java/org/eclipse/jetty/ee10/servlet/ServletMultiPartFormData.java

@@ -316,7 +316,7 @@ public void write(String fileName) throws IOException
         @Override
         public void delete() throws IOException
         {
-            _part.delete();
+            _part.close();
         }
 
         @Override

jetty-ee11/jetty-ee11-servlet/src/main/java/org/eclipse/jetty/ee11/servlet/ServletMultiPartFormData.java

@@ -316,7 +316,7 @@ public void write(String fileName) throws IOException
         @Override
         public void delete() throws IOException
         {
-            _part.delete();
+            _part.close();
         }
 
         @Override