GitLab

* Reuse archiveCompiledFiles helper for long commandline shrink

Since archiveCompiledFiles already handles hot cache correctly, this avoids objs.a being rebuilt even if files don't change.

Would be ideal if PathList could expose a generic Filter API (to get rid of the "duplicated" filter)

* Upgrade go-paths / remove duplicate filter function

* Consider existing archives during the build

* Simplified archiveCompiledFiles function signature

It doesn't make sense anymore to keep path and filename separated.

* Added integration test

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Co-authored-by: Cristian Maglie <c.maglie@arduino.cc>