Don't forward packets received from TPU forwards port (#22078)

* Don't forward packets received from TPU forwards port

* Add banking stage test

program-test/src/lib.rs

@@ -773,6 +773,7 @@ impl ProgramTest {
                 genesis_config,
                 mint_keypair,
                 voting_keypair,
+                validator_pubkey: bootstrap_validator_pubkey,
             },
         )
     }