Register actions to Continuous Onboarding database license_scanning

What does this MR do and why?

Add high-conversion trial actions to Continuous Onboarding database secure license_scanning

Related to #349801 (closed)

Database migration output

$ bundle exec rake db:migrate:up VERSION=20220405061122
== 20220405061122 AddLicenseScanningActionToOnboardingProgresses: migrating ===
-- add_column(:onboarding_progresses, :license_scanning_run_at, :datetime_with_timezone)
   -> 0.0069s
== 20220405061122 AddLicenseScanningActionToOnboardingProgresses: migrated (0.0069s) 


$ bundle exec rake db:migrate:down VERSION=20220405061122
== 20220405061122 AddLicenseScanningActionToOnboardingProgresses: reverting ===
-- remove_column(:onboarding_progresses, :license_scanning_run_at, :datetime_with_timezone)
   -> 0.0028s
== 20220405061122 AddLicenseScanningActionToOnboardingProgresses: reverted (0.0045s) 

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.