Update version numbers for TensorFlow 2.16.1
Before merging this PR, please double check that it has correctly updated
`core/public/version.h`, `tools/pip_package/setup.py`, and
`tensorflow/tensorflow.bzl`. Also review the execution notes below:

```
Major: 2 -> 2
Minor: 16 -> 16
Patch: 0 -> 1

No lingering old version strings "2.16.0-rc0" found in source directory 
"tensorflow/". Good.
WARNING: Below are potentially instances of lingering old version string 
"2.16.0rc0" in source directory "tensorflow/" that are not updated by this 
script. Please check them manually!
tensorflow/tools/pip_package/v2/setup.py:325:2.16.0rc0
tensorflow/tools/pip_package/setup.py:338:2.16.0rc0
```