Supporing AppProfileID in BigtableToAvro DataflowTemplate

[daneshka]

We use BigtableToAvro to backup a huge Bigtable in production.
We have a replication on the BigTable. The main application connects to the Bigtable on one of the regions.
We want to force the backup process (BigtableToAvro) to use a specific Bigtable instance, which is in another region.
The reason is we don't want to affect the main application performance.
This feature already exists in Cloud Bigtable to Cloud Storage SequenceFile

[bobo]

+1 Same reasons, really missing this when switching from the sequencefile job.

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[github-actions]

This issue has been closed due to lack of activity. If you think that is incorrect, or the pull request requires review, you can revive the PR at any time.