fix(caching): /target directory cleanup on Cargo.lock changes

[geekbrother]

Description

This PR adds a conditional /target directory cleanup when the Cargo.lock hash was changed and no cargo cache was found. This will prevent bloating the cache size on every Cargo.lock change, but still will reuse other than /target directories from the cache to save a bit on the building time.

We are using the cache-hit output parameter to check if the exact cache was not found (Cargo.lock was changed).