/bigquery/rest tests use GOOGLE_CLOUD_PROJECT

[lesv]

We should get rid of this and use something to automatically configure from GoogleDefaultAuth

[lesv]

/language/analysis/AnalyzeBetaIT uses projectID to get a bucket for stuff.

[lesv]

/monitoring/cloud-client uses both GOOGLE_CLOUD_PROJECT || GCLOUD_PROJECT

[kurtisvg]

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