[DO NOT MERGE] [WX-1820] GCPBATCH VPC issues

[mcovarr]

Description

Some code to demo the issues I'm seeing trying to use VPC in Google Batch. "Borrows" the commit from #7504 to fix one of the network issue I saw, but I have not yet been able to work around the subnetwork issue.

Release Notes Confirmation

CHANGELOG.md

• [ ] I updated CHANGELOG.md in this PR
• [ ] I assert that this change shouldn't be included in CHANGELOG.md because it doesn't impact community users

Terra Release Notes

• [ ] I added a suggested release notes entry in this Jira ticket
• [ ] I assert that this change doesn't need Jira release notes because it doesn't impact Terra users