### What needs to happen? Migrate BigtableIO to use new [idiomatic java bigtable client](https://github.com/googleapis/java-bigtable) under the hood. Mark the use of `BigtableOptions` as depreacted . ### Issue Priority Priority: 2 (default / most normal work should be filed as P2) ### Issue Components - [ ] Component: Python SDK - [ ] Component: Java SDK - [ ] Component: Go SDK - [ ] Component: Typescript SDK - [X] Component: IO connector - [ ] Component: Beam examples - [ ] Component: Beam playground - [ ] Component: Beam katas - [ ] Component: Website - [ ] Component: Spark Runner - [ ] Component: Flink Runner - [ ] Component: Samza Runner - [ ] Component: Twister2 Runner - [ ] Component: Hazelcast Jet Runner - [ ] Component: Google Cloud Dataflow Runner