Bump github.com/hashicorp/terraform-plugin-sdk/v2 from 2.5.0 to 2.8.0

Bumps [github.com/hashicorp/terraform-plugin-sdk/v2](https://github.com/hashicorp/terraform-plugin-sdk) from 2.5.0 to 2.8.0.
- [Release notes](https://github.com/hashicorp/terraform-plugin-sdk/releases)
- [Changelog](https://github.com/hashicorp/terraform-plugin-sdk/blob/main/CHANGELOG.md)
- [Commits](hashicorp/terraform-plugin-sdk@v2.5.0...v2.8.0)

---
updated-dependencies:
- dependency-name: github.com/hashicorp/terraform-plugin-sdk/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -1,4 +1,5 @@
 module github.com/hashicorp/terraform-provider-google-beta
+
 require (
 	cloud.google.com/go/bigtable v1.10.1
 	github.com/GoogleCloudPlatform/declarative-resource-client-library v0.0.0-20211021165233-f4f2a757f9e0
@@ -14,12 +15,10 @@ require (
 	github.com/hashicorp/go-multierror v1.1.1
 	github.com/hashicorp/go-version v1.3.0
 	github.com/hashicorp/hcl/v2 v2.6.0 // indirect
-	github.com/hashicorp/terraform-json v0.12.0 // indirect
-	github.com/hashicorp/terraform-plugin-sdk/v2 v2.5.0
+	github.com/hashicorp/terraform-plugin-sdk/v2 v2.8.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/mitchellh/hashstructure v1.1.0
 	github.com/spf13/afero v1.2.2 // indirect
-	github.com/zclconf/go-cty v1.5.1 // indirect
 	golang.org/x/mod v0.5.0 // indirect
 	golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420
 	golang.org/x/oauth2 v0.0.0-20211005180243-6b3c2da341f1