Bt personalization pipeline

[billyjacobson]

Fixes #issue

It's a good idea to open an issue first for discussion.

• [ ] I have followed Sample Format Guide
• [ ] pom.xml parent set to latest shared-configuration
• [ ] Appropriate changes to README are included in PR
• [ ] API's need to be enabled to test (tell us)
• [ ] Environment Variables need to be set (ask us to set them)
• [ ] Tests pass: mvn clean verify required
• [ ] Lint passes: mvn -P lint checkstyle:check required
• [ ] Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• [ ] Please merge this PR for me once it is approved.

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 3 region tags.

• bigtable/beam/bulk-data-generator/pom.xml:65, tag bigtable_beam_connector_dependency
• bigtable/beam/retail-personalization/pom.xml:55, tag bigtable_beam_connector_dependency
• bigtable/beam/retail-personalization/src/main/java/personalization/ExportTransactionsToBigQuery.java:78, tag bigtable_beam_helloworld_read_transforms

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