OpenSsl.memoryAddress(...) should use internalNioBuffer(...) if it can't access the memoryAddress (#10818)

Motivation:

We can make use of internalNioBuffer(...) if we cant access the memoryAddress. This at least will reduce the object creations.

Modifications:

Use internalNioBuffer(...) and so reduce the GC

Result:

Less object creation if we can't access the memory address.

handler/src/main/java/io/netty/handler/ssl/OpenSsl.java

@@ -555,7 +555,9 @@ public final class OpenSsl {
 
     static long memoryAddress(ByteBuf buf) {
         assert buf.isDirect();
-        return buf.hasMemoryAddress() ? buf.memoryAddress() : Buffer.address(buf.nioBuffer());
+        return buf.hasMemoryAddress() ? buf.memoryAddress() :
+                // Use internalNioBuffer to reduce object creation.
+                Buffer.address(buf.internalNioBuffer(0, buf.readableBytes()));
     }
 
     private OpenSsl() { }