Fix exclusion in sync workflow -- Version 2

[VeraChristina]

Second attempt to fix sync workflow.

Problem:
The option to exclude files/subfolders from the sync is broken in the dependency repo-file-sync-action (see this PR).

Temporary solution (until this is fixed in the dependency):

• We create two subfolders, all/ and some/, in the directory sync-files/anemoi/, where all/ contains all files that are contained in all single-package anemoi repos, and some/ includes the files that are only included in some of the packages.
• We update the sync file to broadcast the entire directory all/, and the relevant files from the directory some/