Backport Enable sync with package metadata db by default

What does this MR do and why?

In Add admin controls to start the import of License DB we disabled sync with the GitLab License database by default. Now, as we have an application setting to control this, we can enabled it by default and disabled it for QA instances. This change should have been be a part of %16.3, as in that milestone we have removed support for old way to use License Scanning feature, but we neglected to implement this fix. Now we want to backport the change we made in %16.4 to %16.3.

Related Issue(s)

Enable sync with GitLab License database by default

Merge Request Being Backported

Enable sync with package metadata db by default

MR acceptance checklist

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

• This MR is backporting a bug fix, documentation update, or spec fix, previously merged in the default branch.
• The original MR has been deployed to GitLab.com (not applicable for documentation or spec changes).
• This MR has a severity label assigned (if applicable).
• This MR has been approved by a maintainer (only one approval is required).
• Ensure the e2e:package-and-test-ee job has either succeeded or been approved by a Software Engineer in Test.

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• Refer to the patch release runbook for engineers and maintainers for guidance.
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