Update Rust crate testcontainers to 0.23.0

Author: renovate-bot

crates/testkit/Cargo.toml

@@ -48,7 +48,7 @@ hyper-util = { version = "0.1.7", features = [
     "client",
     "client-legacy",
 ] }
-testcontainers = { version = "0.21.0", optional = true }
+testcontainers = { version = "0.23.0", optional = true }
 tokio = "1.39.3"
 tower = { version = "0.4.13", features = ["util"] }