chore: Removed v1beta2 samples and tests (#793)

* get service account

* added map and lint fix

* revert changes

* test: Added retries to batch form parse

* Removed v1beta2 samples

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* reverted version changes

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: 2 people