Clean up many small dependencies (part 3) (#8425)

Follow-up to #8353

Release Notes:
- N/A

crates/workspace/Cargo.toml

@@ -13,6 +13,7 @@ doctest = false
 test-support = [
     "call/test-support",
     "client/test-support",
+    "db/test-support",
     "project/test-support",
     "settings/test-support",
     "gpui/test-support",