Update `ConfigDataEnvironment.checkMandatoryLocations` to use the
actual locations that were imported, including those that were skipped
because the related `ConfigDataResource` had already been imported by a
different location.
Prior to this commit, any location that was skipped because it had
already been imported would throw a `ConfigDataNotFoundException`.
Closes gh-26147
Co-authored-by: Scott Frederick <sfrederick@vmware.com>
Co-authored-by: Madhura Bhave <mbhave@vmware.com>