Delete desired config generator version column

Issue: Drop the desired_config_generator_version colum... (#538166 - closed) • Ashvin Sharma • 18.7

What does this MR do and why?

Delete desired config generator version column

This is done because we are no longer using desired_config_generator. All the kubernetes configuration is frozen at the time of workspace creation and is re-used for reconciliation.

Changelog: other

EE: true

References

Related to epic—Simplify freezing of Kubernetes resources for w... (&17483) • Ashvin Sharma

MR where this column was marked ignore—Mark desired_config_generator_version ignore fo... (!205613 - merged) • Ashvin Sharma • 18.5

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