support ACTIVATE_VERSION experimental Singer column

[jmriego]

Problem

Add support for the experimental Singer command ACTIVATE_VERSION that removes records from non-matching versions. Needed to support tables with hard deletes where log based replication isn't available. This command isn't documented anywhere that I can find, but it seems like a few taps and targets support it, best reference I've found is https://gitlab.com/meltano/meltano/-/issues/2508

Proposed changes

Using _sdc_table_version, which is defined in the Stitch docs here: https://www.stitchdata.com/docs/replication/loading/system-tables-columns

Types of changes

What types of changes does your code introduce to target-bigquery?

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

• Description above provides context of the change
• I have added tests that prove my fix is effective or that my feature works
• Unit tests for changes (not needed for documentation changes)
• CI checks pass with my changes
• Bumping version in setup.py is an individual PR and not mixed with feature or bugfix PRs
• Commit message/PR title starts with [AP-NNNN] (if applicable. AP-NNNN = JIRA ID)
• Branch name starts with AP-NNN (if applicable. AP-NNN = JIRA ID)
• Commits follow "How to write a good git commit message"
• Relevant documentation is updated including usage instructions