Moving up to version 3.5.1-bb.10 for gatekeeper

Package Owner Merge Request

Package Changes

What package changes are included with this merge request? The more detail here the better!

Upgrade opa-gatekeeper package to 3.5.1-bb.10 (This removes the unique service selector rule)

Also, include any issues closed with "Closes #ISSUE_NUMBER". See example:

Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/48