Fix cmake failure when two packages with different type have same id

Earlier we used to create temporary json in $component-metadata.json,
but this failed if we have two packages with same id, for instance in
phone there is org.kde.plasma.phone shell package and look-and-feel
package.

CCMAIL: release-team@kde.org
CCMAIL: distributions@kde.org
CCMAIL: faure@kde.org

Reviewed-by:  <notmart@gmail.com>

David, can you please do 5.29 re-tar with this?