Add scopes option support

[nroman197]

• [x] Do only one thing
• [x] Non breaking API changes
• [x] Tested

What did this pull request do?

• Add support to authenticate using scopes.
  • Refactor the existing method that parses the URI to be parsed by using the net/url library.
  • Use the WithScopes() option to create the bigquery client.
  • The scopes will be included as optional in the connection string as follows: bigquery://project_id/dataset?scopes=scope1,scope2,scope3
• No breaking changes have been introduced:
  • The configFromURI() function has been refactored to meet the same behavior as before.
  • The scopes in the URI string can be added as optional without affecting the current behavior if the query parameter is not present.

User Case Description

Background: In order to implement an extractor that uses the Gorm BigQuery driver, we require the use of scopes to get data from a view that is being populated by a Google Sheet.

Feature: Being able to authenticate the bigquery client by passing OAuth2 scopes received in the uri.

Some examples of valid connection strings:

"bigquery://project-id/location/dataset?scopes=https://www.googleapis.com/auth/drive,https://www.googleapis.com/auth/bigquery"

"bigquery://bigquery-credits/dataset?scopes=https://www.googleapis.com/auth/drive,https://www.googleapis.com/auth/bigquery"

"bigquery://bigquery-credits/location/dataset"

"bigquery://bigquery-credits/dataset"