feat(bigquery): update the api

#### bigquery:v2

The following keys were deleted:
- schemas.JobStatistics.properties.transactionInfoTemplate.$ref (Total Keys: 1)

The following keys were added:
- schemas.ExternalDataConfiguration.properties.decimalTargetTypes (Total Keys: 2)
- schemas.JobStatistics.properties.transactionInfo.$ref (Total Keys: 1)
- schemas.JobStatistics2.properties.dmlStats.type (Total Keys: 1)
- schemas.QueryResponse.properties.dmlStats.type (Total Keys: 1)

Author: yoshi-automation