NoSuchMethodError when writing to BigTable

In short, Beam is invoked and deprecated and removed function from Guava in its BigTable code. The method `Futures.addCallback(future, callback)` has been removed since guava-26.0.

This is the guava commit that effectively removes the method https://github.com/google/guava/commit/87d87f5cac5a540d46a6382683722ead7b72d1b3#diff-5c3f56c125a86c8adde4e8754f104468. The deprecation notice is there since guava 22.0

Beam is calling this method here https://github.com/apache/beam/blob/release-2.11.0/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigtable/BigtableServiceImpl.java#L230

The PR in https://issues.apache.org/jira/browse/BEAM-4948 contains a possible fix, but it looks like it never got merged back.

The bottom of a Dataflow stacktrace looks like
```

Caused by: java.lang.NoSuchMethodError: com.google.common.util.concurrent.Futures.addCallback(Lcom/google/common/util/concurrent/ListenableFuture;Lcom/google/common/util/concurrent/FutureCallback;)V
at
org.apache.beam.sdk.io.gcp.bigtable.BigtableServiceImpl$BigtableWriterImpl.writeRecord(BigtableServiceImpl.java:230)
at
org.apache.beam.sdk.io.gcp.bigtable.BigtableIO$Write$BigtableWriterFn.processElement(BigtableIO.java:709)

```

Imported from Jira [BEAM-6817](https://issues.apache.org/jira/browse/BEAM-6817). Original Jira may contain additional context.
Reported by: jrglee.