Add new resource Service for Apphub #2048

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"*add new resource service for apphub (#10132)
add new resource for service project for apphub

enable apphub api in test cases
fix precheck error
fix precheck error
fix precheck error
fix precheck error
resolve comments
fix lint error
fix errors
add new resource for service for apphub
fix examples
add test
fix tests
add iam permissions
add iam permission
fix iam issues
remove merged changes
add billing account
remove extra delay from tests
add handwritten update test
remove merged changes
make changes to yaml file incorporating comments from GoogleCloudPlatform/magic-modules#10155
fix lint errors in service yaml definition
add a delay between discovered resource fetch and forwarding rule creation
add a delay between discovered resource fetch and forwarding rule creation
add a delay between discovered resource fetch and forwarding rule creation
batch update tests to improve speed
use standard diff suppress function
update region from us-east1 to us-central1

[upstream:4fa7f7c5c43d93b9813acd33ecf232f6cd6151ed]

signed-off-by: modular magician magic-modules@google.com*"