Create __init__.py (#78629)

To make `torch.utils.jit` a proper package, otherwise it will not be added to the wheel

Pull Request resolved: https://github.com/pytorch/pytorch/pull/78629
Approved by: https://github.com/seemethere, https://github.com/xuzhao9, https://github.com/davidberard98

docs/source/index.rst

@@ -99,6 +99,7 @@ Features described in this documentation are classified by release status:
    torch.utils.checkpoint <checkpoint>
    torch.utils.cpp_extension <cpp_extension>
    torch.utils.data <data>
+   torch.utils.jit <jit_utils>
    torch.utils.dlpack <dlpack>
    torch.utils.mobile_optimizer <mobile_optimizer>
    torch.utils.model_zoo <model_zoo>

docs/source/jit_utils.rst

@@ -0,0 +1,4 @@
+JIT Utils - torch.utils.jit
+==================================================
+
+.. automodule:: torch.utils.jit

torch/utils/jit/__init__.py

@@ -0,0 +1 @@
+