Impose non geodiff push limits

[varmar05]

Let's limit the size of single push by imposing:

• 100 of files / per push, do not count 'deleted' files in push metadata, (do more pushes if hit)
• max 10 GB of media file (not .gpkg) (sorry, not possible to fix)
• max 5 GB of .gpkg (sorry, not possible, split manually into multiple gpkg files, e.g. in plugin)

And split the work into multiple pushes / files.

[MarcelGeo]

Python api client job:

• number of files
• size of media file
• size of gpkg - (added, updated)