Add telemetry events for loading extensions (#9793)

* Store extensions versions' wasm API version in the database
* Share a common struct for extension API responses between collab and
client
* Add wasm API version and schema version to extension API responses

Release Notes:

- N/A

Co-authored-by: Marshall <marshall@zed.dev>

crates/collab/migrations/20240335123500_add_extension_wasm_api_version.sql

@@ -0,0 +1 @@
+ALTER TABLE extension_versions ADD COLUMN wasm_api_version TEXT;