only test notebooks that are checked into git (#3713)

This helps with local running of the notebook tests - it will only pick up notebooks that are checked into git.
Related to #3603.

dev_tools/notebook_test.py

@@ -14,7 +14,9 @@
 import functools
 import glob
 import os
+import subprocess
 import sys
+from typing import Set
 
 import pytest
 from filelock import FileLock
@@ -35,8 +37,13 @@
 ]
 
 
+def _list_all_notebooks() -> Set[str]:
+    output = subprocess.check_output(['git', 'ls-files', '*.ipynb'])
+    return set(output.decode('utf-8').splitlines())
+
+
 def _tested_notebooks():
-    all_notebooks = set(glob.glob("**/*.ipynb", recursive=True))
+    all_notebooks = _list_all_notebooks()
     skipped_notebooks = functools.reduce(
         lambda a, b: a.union(b), list(set(glob.glob(g, recursive=True)) for g in SKIP_NOTEBOOKS)
     )