[dynamo] Add documentation for guard_filter_fn (#156114)

Summary: Adding a section of doc for guard_filter_fn.

Test Plan:
CI

Rollback Plan:

Differential Revision: D76756743

Pull Request resolved: https://github.com/pytorch/pytorch/pull/156114
Approved by: https://github.com/jansel

torch/__init__.py

@@ -2571,6 +2571,14 @@ def compile(
 
         - `trace.graph_diagram` which will show you a picture of your graph after fusion
 
+        - `guard_filter_fn` that controls which dynamo guards are saved with compilations.
+          This is an unsafe feature and there is no backward compatibility guarantee provided
+          for dynamo guards as data types.
+          For stable helper functions to use, see the documentations in `torch.compiler`, for example:
+          - `torch.compiler.skip_guard_on_inbuilt_nn_modules_unsafe`
+          - `torch.compiler.skip_guard_on_all_nn_modules_unsafe`
+          - `torch.compiler.keep_tensor_guards_unsafe`
+
         - For inductor you can see the full list of configs that it supports by calling `torch._inductor.list_options()`
        disable (bool): Turn torch.compile() into a no-op for testing