return codecov artifact from modal image

cicd/multigpu.py

@@ -77,7 +77,18 @@ def run_cmd(cmd: str, run_folder: str):
 def cicd_pytest():
     run_cmd("./cicd/multigpu.sh", "/workspace/axolotl")
 
+    # Read the coverage file if it exists
+    coverage_file = pathlib.Path("/workspace/axolotl/multigpu-coverage.xml")
+    if coverage_file.exists():
+        return coverage_file.read_text(encoding="utf-8")
+    return None
+
 
 @app.local_entrypoint()
 def main():
-    cicd_pytest.remote()
+    coverage = cicd_pytest.remote()
+
+    # Save the coverage file to the local filesystem if it was generated
+    if coverage:
+        with open("multigpu-coverage.xml", "w", encoding="utf-8") as file:
+            file.write(coverage)