Dataflow Template: Support additional JDBC sources

Currently, the Dataflow Template only supports BigQuery via the BQ JDBC drivers. We should support all of the sources that DVT has row hash support for. The first step would be to add the additional sources' JDBC drivers as a dependency to the [pom.xml](https://github.com/ajwelch4/DataflowTemplates/blob/b7b7a8530f2ce0ff0042f7027bc1f151ba4f4b85/v2/data-validation/pom.xml). The second step would be to modify the [`getDataSourceConfiguration`](https://github.com/ajwelch4/DataflowTemplates/blob/b7b7a8530f2ce0ff0042f7027bc1f151ba4f4b85/v2/data-validation/src/main/java/com/google/cloud/teleport/v2/templates/DataValidation.java#L285-L304) method to construct the proper `DataSourceConfiguration` instances given the contents of the DVT connection file stored on GCS.