RUST-2240 Enable bson serde_json-1 feature flag where necessary (#1416)

Author: isabelatkinson

Cargo.lock

@@ -70,7 +70,7 @@ in-use-encryption-unstable = ["in-use-encryption"]
 # Enables support for emitting tracing events.
 # The tracing API is unstable and may have backwards-incompatible changes in minor version updates.
 # TODO: pending https://github.com/tokio-rs/tracing/issues/2036 stop depending directly on log.
-tracing-unstable = ["dep:tracing", "dep:log"]
+tracing-unstable = ["dep:tracing", "dep:log", "bson3?/serde_json-1"]
 
 [dependencies]
 async-trait = "0.1.42"
@@ -207,6 +207,13 @@ reqwest = { version = "0.12.2", features = ["rustls-tls"] }
 serde-hex = "0.1.0"
 serde_path_to_error = "0.1"
 
+[dev-dependencies.bson3]
+git = "https://github.com/mongodb/bson-rust"
+branch = "main"
+package = "bson"
+version = "3.0.0"
+features = ["serde", "serde_json-1"]
+
 [package.metadata.docs.rs]
 rustdoc-args = ["--cfg", "docsrs"]
 all-features = true