Fix extension tests on release branches (#20307)

Co-Authored-By: Max <max@zed.dev>
cc @maxdeviant

Release Notes:

- N/A

---------

Co-authored-by: Max <max@zed.dev>

crates/extensions_ui/Cargo.toml

@@ -52,6 +52,7 @@ async-tar.workspace = true
 ctor.workspace = true
 editor = { workspace = true, features = ["test-support"] }
 env_logger.workspace = true
+extension_host = {workspace = true, features = ["test-support"] }
 fs = { workspace = true, features = ["test-support"] }
 gpui = { workspace = true, features = ["test-support"] }
 http_client.workspace = true