[rust][third-party] Vendor ractor 0.12.4 and upgrade tokio to 1.41.0

Summary:
From release notes:

Ractor v0.12.4 is released!

In this release there are 2 primary changes
1. We're adding the ability to runtime inspect the message type of an untyped `ActorCell` which can be helpful for supervision flows
2. We're also adding helpers for interacting with a supervisor's children (retrieval of the children, stopping them, and draining them) without having to have the supervisor keep additional handles around

Both are in #277

Tokio is being upgraded to add support for `join_all()` in `JoinSet` which `ractor` leverages (easier to upgrade than backport a hack into ractor)

Test Plan:
Ci & third-party check.

Asll the changes are additive, so should be a no-op, since it's unused functionality.

Reviewed By: Imxset21

Differential Revision: D64833735

fbshipit-source-id: 897302bf95467310131348f1ee8c1f766e81f725

antlir/antlir2/sendstream_parser/Cargo.toml

@@ -22,7 +22,7 @@ nix = "0.25"
 nom = "7.1"
 serde = { version = "1.0.185", features = ["derive", "rc"], optional = true }
 thiserror = "1.0.64"
-tokio = { version = "1.37.0", features = ["full", "test-util", "tracing"] }
+tokio = { version = "1.41.0", features = ["full", "test-util", "tracing"] }
 uuid = { version = "1.2", features = ["serde", "v4", "v5", "v6", "v7", "v8"] }
 
 [dev-dependencies]