Make action more verbose

[rosik]

Nowadays action logs look as follows:

Post job cleanup.
/bin/tar --posix --use-compress-program zstd -T0 -cf cache.tzst -P -C /home/runner/work/myproject/myproject --files-from manifest.txt
Cache saved successfully

Run actions/cache@v2
Received 18558184 of 18558184 (100.0%), 81.6 MBs/sec
Cache Size: ~18 MB (18558184 B)
/bin/tar --use-compress-program zstd -d -xf /home/runner/work/_temp/d80ef6ce-a8ac-4a93-9c91-fdfc6ad18354/cache.tzst -P -C /home/runner/work/myproject/myproject
Cache restored from key: mycache

It doesn't give enough information to check that CI job works as expected. I think action logs should also include:

• File list for both pre and post jobs. (Resolved in Make caching more verbose toolkit#650, awaits dep update)
• Cache size for the post job. (Resolved in Make caching more verbose toolkit#650, awaits dep update)
• Caching key for the post job. (To be resolved in Make save/restore logs akin #509)