refactor: use opentelemetry-testing from registry

Signed-off-by: Jeremie Drouet <jeremie.drouet@gmail.com>

Author: jdrouet

Cargo.lock

@@ -24,13 +24,10 @@ tracing = { version = "0.1" }
 [dev-dependencies]
 anyhow = "1"
 opentelemetry = "0.30"
-opentelemetry-testing = { path = "./opentelemetry-testing" }
+opentelemetry-testing = "0.1"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 serial_test = { version = "3.2" }
 sqlx = { version = "0.8", features = ["runtime-tokio"] }
 testcontainers = "0.25"
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
-
-[workspace]
-members = ["opentelemetry-testing"]