secretmanager: point beta provider to v1 of the api

[modular-magician]

The v1 api is a superset of v1beta1. New features are added to v1 and not v1beta1.

Part of hashicorp/terraform-provider-google#8415

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Release Note Template for Downstream PRs (will be copied)

secretmanager: pointed beta provider to v1 of the api instead of v1beta1 as active development is against v1

Derived from GoogleCloudPlatform/magic-modules#4479