Some test cases are unsupported due to environmental or
blocking code restrictions (e.g. unimplemented dependent resources).
As these will likely not be fixed before the first release certified
for Ansible 2.11 and beyond, documenting them instead.
- gcp_spanner_instance works, enabling for CI.
- gcp_resourcemanager_project is running into quota issues for
listing the API to verify state. Adding a to-do as well as
removing some people-specific names.
