Creating packages with PackageMaker does not create .building tag file

When programmatically creating packages using make_package no .buildx.y file is created.
I am using this in my version of a rez-pip approach. With bigger packages this can lead to the same issues as with building actually.

Start by tracing the make_package entry point used for programmatic package creation. Compare its behavior with normal package building and determine when the .buildx.y or .building tag file should be created. Done means packages created through make_package produce the expected tag file and avoid the reported issues with larger packages.

Written by the indexing model from the issue text.