[NNC] TensorExprKernel state should not be modified on calls to run methods (#73028)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/73028
A typical use case for `TensorExprKernel` is to create the kernel once and call it multiple times, possibly in parallel. For the parallel calls to work, we need to ensure that the run() method calls do not change any state in `TensorExprKernel`.
Before this change, the `run()` method was modifying the sizes and strides vectors when dynamic shapes were present. This manifested as a data race when running a model with Static Runtime.
ghstack-source-id: 149398820
Test Plan:
```
buck build mode/dev-asan //caffe2/test/cpp/tensorexpr:tensorexpr
./buck-out/dev/gen/caffe2/test/cpp/tensorexpr/tensorexpr --gtest_filter="DynamicShapes.MultiThreadedExecution"
```
Reviewed By: eellison
Differential Revision: D34287960
fbshipit-source-id: d311f3c5a66c5d5de4e1deaeaa01816b53e9906e
(cherry picked from commit 161568bfae9fc1497a36d6103f49deda001509a4)
