Add Build Trigger for 2.3-rc1 release

[lsy323]

Similar to #5908 which added trigger for 2.2-rc1 release.

[zpcore]

The v2.3.0-rc is not out yet for pytorch, does this cause any concern if we make the change ahead of the tag creation?

[lsy323]

The v2.3.0-rc is not out yet for pytorch, does this cause any concern if we make the change ahead of the tag creation?

My understanding is the build will be triggered when the tag is created. So we should set up the trigger first, then create the tag to trigger the build. cc @will-cromar for confirmation.

[lsy323]

cc @bhavya01 who shadows this release.

[lsy323]

Do not merge until upstream PyTorch has the rc tag created, so we can use the real rc number in our build.

[lsy323]

Upstream already has rc2, update the version to rc2 in tf config file.