enable rsa feature for libp2p

[LesnyRumcajs]

Summary of changes

Changes introduced in this pull request:

• Forest fails to connect to more strict bootstrap peers. This change permits upgrading the connections to encrypted ones (to my understanding):

2024-02-27T12:11:47.625785Z DEBUG Transport::dial{address=/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST}: multistream_select::dialer_select: Dialer: Received confirmation for protocol: /noise
2024-02-27T12:11:47.894584Z DEBUG Transport::dial{address=/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST}: libp2p_identity::keypair: support for RSA was disabled at compile-time
2024-02-27T12:11:47.894605Z DEBUG Transport::dial{address=/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST}: libp2p_core::upgrade::apply: Failed to upgrade outbound stream upgrade=/noise
2024-02-27T12:11:47.894638Z DEBUG Swarm::poll: libp2p_kad::behaviour: Last remaining address of peer is unreachable. peer=QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST address=/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST
2024-02-27T12:11:47.894652Z DEBUG Swarm::poll: libp2p_swarm: Connection attempt to peer failed with Transport([("/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST", Other(Custom { kind: Other, error: Other(Left(Right(Apply(InvalidKey(DecodingError { msg: "cargo feature `rsa` is not enabled", source: None }))))) }))]). peer=QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST

Reference issue to close (if applicable)

Closes #3990

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

[hanabi1224]

Should we explicitly enable all of secp256k1, ecdsa, rsa and ed25519?

[LesnyRumcajs]

Let's add them. I'll ask around to ensure it's ultimately what we need.

[hanabi1224]

As per the code, the list should be exhaustive

#[derive(Debug, Clone)]
#[allow(clippy::large_enum_variant)]
enum KeyPairInner {
    /// An Ed25519 keypair.
    #[cfg(feature = "ed25519")]
    Ed25519(ed25519::Keypair),
    /// An RSA keypair.
    #[cfg(all(feature = "rsa", not(target_arch = "wasm32")))]
    Rsa(rsa::Keypair),
    /// A Secp256k1 keypair.
    #[cfg(feature = "secp256k1")]
    Secp256k1(secp256k1::Keypair),
    /// An ECDSA keypair.
    #[cfg(feature = "ecdsa")]
    Ecdsa(ecdsa::Keypair),
}

[lemmih]

What does enabling rsa do?

[LesnyRumcajs]

What does enabling rsa do?

2024-02-27T12:11:47.625785Z DEBUG Transport::dial{address=/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST}: multistream_select::dialer_select: Dialer: Received confirmation for protocol: /noise
2024-02-27T12:11:47.894584Z DEBUG Transport::dial{address=/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST}: libp2p_identity::keypair: support for RSA was disabled at compile-time
2024-02-27T12:11:47.894605Z DEBUG Transport::dial{address=/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST}: libp2p_core::upgrade::apply: Failed to upgrade outbound stream upgrade=/noise
2024-02-27T12:11:47.894638Z DEBUG Swarm::poll: libp2p_kad::behaviour: Last remaining address of peer is unreachable. peer=QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST address=/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST
2024-02-27T12:11:47.894652Z DEBUG Swarm::poll: libp2p_swarm: Connection attempt to peer failed with Transport([("/dns4/bootstrap-venus.mainnet.filincubator.com/tcp/8888/p2p/QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST", Other(Custom { kind: Other, error: Other(Left(Right(Apply(InvalidKey(DecodingError { msg: "cargo feature `rsa` is not enabled", source: None }))))) }))]). peer=QmQu8C6deXwKvJP2D8B6QGyhngc3ZiDnFzEHBDx8yeBXST

To my understanding, it allows upgrading the connection to an encrypted one.