TeamCity: add Ephemeral-write-only subproject

[modular-magician]

Note

This will be marked as Ready for Review once we have a 1.11 TF alpha version ready

Marking Ready for Review with the release of v1.11.0-alpha20241211

This project is meant to be used for testing Write-Only attributes on resources that will support it in Terraform 1.11

It will do the following:

• Use the latest 1.11 TF Version
• Run builds on services that will have resources that use write-only attributes
• Have builds that use modular-magician / HC owned repos
• CRON triggers to schedule builds on hc repos

Here's a preview of the changes

How Triggers are set

Release Note Template for Downstream PRs (will be copied)

See Write release notes for guidance.

Derived from GoogleCloudPlatform/magic-modules#12538