Feature/add project shared vpc resources selectors

[bradkwadsworth-mw]

Description of your changes

Enabled google_compute_shared_vpc_host_project and google_compute_shared_vpc_service_project. It would appear that google_compute_shared_vpc_service_project requires the google-beta provider in order to work in some situations such as when the Shared VPC Admin role is set at the folder level. Has there been an discussion on creating another Upjet provider based on the google-beta Terraform provider?
Added host project and service project selectors for SharedVPCHostProject and SharedVPCServiceProject resources.

Fixes #80

I have:

• Run make reviewable test to ensure this PR is ready for review.

How has this code been tested

Tested the creation of a GCP project and enabled that project as a VPC host project. Also created a service project and attached it to the host project.

[turkenf]

Required status checks have been changed, could you please rebase this PR?

[sergenyalcin]

/test-examples="examples/compute/sharedvpchostproject.yaml"

[bradkwadsworth-mw]

/test-examples="examples/compute/sharedvpchostproject.yaml"

[turkenf]

Closing & reopening to trigger the Github workflow runs.

[turkenf]

/test-examples="examples/compute/sharedvpchostproject.yaml"

[turkenh]

Resources in this PR require manual intervention, i.e. privileged access in multiple gcp projects, so ignoring failing uptest runs. I am not sure why it failed despite themanual-internvention annotation, though.