ci(lesavka): classify cargo unit tests as unit telemetry

scripts/ci/test_gate.sh

@@ -135,6 +135,10 @@ if cargo_toml_path.exists():
         category_by_test_name[current_name] = category_for_path(current_path)
 
 def category_for_target(target: str) -> str:
+    for prefix in ('unittests ', 'doctests '):
+        if target.startswith(prefix):
+            target = target[len(prefix):]
+            break
     if target in category_by_path:
         return category_by_path[target]
     target_path = pathlib.PurePosixPath(target)