Release google-cloud-pubsub 2.1.0 (googleapis#7646)

#### Features

* quota_project can be set via library configuration ([googleapis#7630](https://www.github.com/googleapis/google-cloud-ruby/issues/7630))
* Add push_config (PushConfig) param to Topic#subscribe
  * Make PushConfig constructor public.

#### Documentation

* Update sample code for on_error, at_exit, and concurrency tuning

Release google-cloud-firestore 2.2.0 (googleapis#7667)

#### Features

* quota_project can be set via library configuration ([googleapis#7630](https://www.github.com/googleapis/google-cloud-ruby/issues/7630))

#### Documentation

* Add snapshot query cursor sample ([googleapis#7601](https://www.github.com/googleapis/google-cloud-ruby/issues/7601))

Release google-cloud-datastore 2.1.0 (googleapis#7666)

#### Features

* quota_project can be set via library configuration ([googleapis#7630](https://www.github.com/googleapis/google-cloud-ruby/issues/7630))

Release google-cloud-bigtable 2.1.0 (googleapis#7670)

#### Features

* quota_project can be set via library configuration ([googleapis#7630](https://www.github.com/googleapis/google-cloud-ruby/issues/7630))

Release google-cloud-bigquery 1.23.0 (googleapis#7679)

#### Features

* quota_project can be set via library configuration ([googleapis#7627](https://www.github.com/googleapis/google-cloud-ruby/issues/7627))

Release google-cloud-asset-v1 0.7.0 (googleapis#7681)

Release google-cloud-translate-v2 0.2.0 (googleapis#7677)

Release google-cloud-resource_manager 0.34.0 (googleapis#7676)

Release google-cloud-logging 2.1.0 (googleapis#7668)

Release google-cloud-error_reporting 0.41.0 (googleapis#7669)