shrinks size of Packet.Meta (backport #22224) (#22273)

* removes seed and slot fields from Packet.Meta

507367e6ac
updated window-service to send shreds (as opposed to packets) to
retransmit-stage and so seed and slot fields in Packet.Meta are unused:
https://github.com/solana-labs/solana/blob/d6ec103be/sdk/src/packet.rs#L27-L28

(cherry picked from commit aa9f7ed7e8)

* uses std::net::IpAddr type for Packet.Meta.addr

(cherry picked from commit 73a7741c49)

# Conflicts:
#	streamer/src/streamer.rs

* adds bitflags to Packet.Meta

Instead of a separate bool type for each flag, all the flags can be
encoded in a type-safe bitflags encoded in a single u8:
https://github.com/solana-labs/solana/blob/d6ec103be/sdk/src/packet.rs#L19-L31

(cherry picked from commit 01a096adc8)

# Conflicts:
#	sdk/Cargo.toml

* removes backport merge conflicts

Co-authored-by: behzad nouri <behzadnouri@gmail.com>

entry/src/entry.rs

@@ -549,7 +549,7 @@ pub fn start_verify_transactions(
                 );
                 let verified = packet_batches
                     .iter()
-                    .all(|batch| batch.packets.iter().all(|p| !p.meta.discard));
+                    .all(|batch| batch.packets.iter().all(|p| !p.meta.discard()));
                 verify_time.stop();
                 (verified, verify_time.as_us())
             });