Prepare for Cocoapods 1.3 Release (#26751)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26751
### Summary
We're going to use the AWS s3 bucket - `s3://ossci-ios` to store the release binary. To release the cocoapods, we can follow the steps below:
1. Open a fake PR to trigger the CI job that pulls the code from the 1.3.0 tag branch and does the building and uploading.
2. Verify the binary locally - Run tests on both arm64 and simulator
3. Publish the cocoapods officially
### Test plan
- podspec lint command succeeds
- `pod spec lint --verbose --allow-warnings --no-clean --use-libraries --skip-import-validation`
Test Plan: Imported from OSS
Differential Revision: D17577131
Pulled By: xta0
fbshipit-source-id: 55fee918ecc5c4e0b6d714488a12351b4370afac
