internal/generic: fix post-merge compilation error

Author: jar-b

internal/generic/resource.go

@@ -20,6 +20,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-framework/resource/identityschema"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema"
 	"github.com/hashicorp/terraform-plugin-framework/tfsdk"
+	"github.com/hashicorp/terraform-plugin-framework/types"
 	"github.com/hashicorp/terraform-plugin-go/tftypes"
 	"github.com/hashicorp/terraform-plugin-log/tflog"
 	ccdiag "github.com/hashicorp/terraform-provider-awscc/internal/errs/diag"