Backport Windows builds into 2.18 for 2.18.1 (#88848)

* Update scripts/configs for Windows nightly/release builds.

`set -u` (does not allow unbound variables) has been removed from all scripts.
This is due to Docker on Windows treating variables in an env file,
set to an empty value (`MY_VAR=`), as unbound variables. Consequently,
these variables, even though they are "set", do not make it into the Docker
container at all, and various checks for those variables fail outright.

PiperOrigin-RevId: 713717958

(cherry picked from commit fa3b3c1)

* Fix up the 2022 Win RBE config.

PiperOrigin-RevId: 718920772

(cherry picked from commit 82ba59a)

* Adjust the wheel.sh, libtensorflow.sh scripts to be Win-compatible for upload.

Temporary workaround.

PiperOrigin-RevId: 719027529
(cherry picked from commit 7513f77)

* Add a workaround for gsutil not working properly on MSYS2.

PiperOrigin-RevId: 719389902
(cherry picked from commit 9ab2fee)

* Add the missing wheel name specification for Windows.

PiperOrigin-RevId: 720176067
(cherry picked from commit 768059f)

* Allow building identical wheels under additional names.

Currently only needed for Windows, since the same wheel is uploaded
to both tensorflow_cpu, and tensorflow PyPi repos,
but different names/metadata are needed.

PiperOrigin-RevId: 720313792

(cherry picked from commit a93dc78)

* Actually copy the extra wheels into the expected directory afterwards.

PiperOrigin-RevId: 720753829
(cherry picked from commit 6ba7e4e)

Merge pull request #88658 from tensorflow/r2.19-3a79ec99874

r2.19 cherry-pick: 3a79ec9 "Bump libtpu versions to pick correct versioned nightlies"

Merge pull request #87694 from tensorflow/r2.19-cf611dd7c6e

r2.19 cherry-pick: cf611dd "Update 2.19.0 release notes that we stopped publishing libtensorflow packages"

Merge pull request #78464 from tensorflow/rtg0795-patch-1

Update RELEASE.md to move TFLite SignatureRunner to the right section

Merge pull request #72195 from tensorflow/r2.17-314385ab894

r2.17 cherry-pick: 314385a "Bump minSdkVersion of TFL Android libs to 21."

Merge pull request #77589 from tensorflow-jenkins/version-numbers-2.1…

…8.0rc2-14407

Update version numbers for TensorFlow 2.18.0-rc2

Merge pull request #77025 from tensorflow-jenkins/version-numbers-2.1…

…8.0rc1-23493

Update version numbers for TensorFlow 2.18.0-rc1

Merge pull request #76593 from rtg0795/r2.18

Update protobuf nightly to <6.0.0dev

Merge pull request #71345 from tensorflow-jenkins/version-numbers-2.1…

…7.0-6959

Update version numbers for TensorFlow 2.17.0

Merge pull request #70600 from tensorflow/r2.17-2d72742d40f

r2.17 cherry-pick: 2d72742 "Add tensorflow support for 16k page sizes on arm64"