Summary

Contributes to #16934

Occurred changes and/or fixed issues

• convert Fleet product registration to the new method
• update logic of new prod reg to accomodate demands of Fleet
• update docs
• update unit tests

Technical notes summary

Areas or cases that should be tested

• make sure that all areas of Fleet work as expected. Check create, edit, detail views.

Areas which could experience regressions

• make sure that all areas of Fleet work as expected

Screenshot/Video

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
• The PR has a Milestone
• The PR template has been filled out
• The PR has been self reviewed
• The PR has a reviewer assigned
• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes
• The PR has been reviewed in terms of Accessibility
• The PR has considered, and if applicable tested with, the three Global Roles Admin, Standard User and User Base