add filelock as a dependency (pytorch#91607)

`filelock` is a dependency now for inductor's caching mechanism and CPU backend.

Add `filelock` as a dependency

Fixes pytorch#93499

Pull Request resolved: pytorch#91607
Approved by: https://github.com/anijain2305, https://github.com/jansel

Author: soumith

setup.py

@@ -1013,6 +1013,7 @@ def print_box(msg):
 def main():
     # the list of runtime dependencies required by this built package
     install_requires = [
+        'filelock',
         'typing_extensions',
         'sympy',
         'networkx',