[pyright] check=False subprocess output (#16609)

## Summary & Motivation

🤦 

## How I Tested These Changes

`make pyright`

scripts/run-pyright.py

@@ -348,7 +348,7 @@ def run_pyright(
         shell_cmd = " \\\n".join([base_pyright_cmd, *[f"    {p}" for p in paths or []]])
         print(f"Running pyright for environment `{env}`...")
         print(f"  {shell_cmd}")
-        result = subprocess.run(shell_cmd, capture_output=True, shell=True, text=True, check=True)
+        result = subprocess.run(shell_cmd, capture_output=True, shell=True, text=True, check=False)
         try:
             json_result = json.loads(result.stdout)
         except json.JSONDecodeError: