Migration Guide for GCP v8 (#5403)

* Migration Guide

* Address review comments

themes/default/content/registry/packages/gcp/how-to-guides/8-0-migration.md

@@ -0,0 +1,33 @@
+---
+title: "GCP 8.0 Migration Guide"
+h1: "Migrating from GCP 7.x to 8.x"
+meta_desc: Practitioner level instructions for migrating from pulumi-gcp 7.x to 8.x.
+layout: package
+---
+
+## Upstream Changes
+The v8 release of the pulumi-gcp provider is targeting upstream [v6.0.1](https://github.com/hashicorp/terraform-provider-google/releases/tag/v6.1.0). 
+Please refer to the [upstream migration guide](https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/version_6_upgrade) as well as the [v.6.0.0 CHANGELOG](https://github.com/hashicorp/terraform-provider-google/releases/tag/v6.0.0).
+
+Of note: Multiple resources now have a new field `deletionProtection` which is set to true by default and will prevent these resources from getting deleted with `pulumi destroy`. When upgrading, it is recommended you add this field and set it to the desired behavior.
+
+## Breaking Changes
+
+### cloudrunv2.Service Ports
+
+The following change is additionally breaking in Pulumi:
+
+The `template.containers[].ports` field in `cloudrunv2.Service` has been changed from a list item to an object item. 
+You may need to make a small adjustment to your code to reflect this change.
+
+### Default label
+
+This version of the provider adds a new global default label, `goog-pulumi-provisioned`, to each resource. 
+It will be written to the `pulumiLabels` and `effectiveLabels` output fields.
+Note that this label is not managed in the resource’s `labels` field. 
+It is set by the provider, to help differentiate pulumi-provisioned resources from others in the GCP console.
+To opt out of this default behavior, set `addPulumiAttributionLabel` to `false`:
+
+```console
+pulumi config set gcp:addPulumiAttributionLabel false
+```