Clean up extracted packages from the conda packages directory, keeping only
the compressed archive cache and loose archive files.
Instead of recursively deleting each extracted folder (extremely slow on
Windows due to filesystem overhead), we rename them to a sibling directory
on the same filesystem. On self-hosted (persistent) runners, stash
directories from previous runs are cleaned up before new ones are created.
Clean up extracted packages from the conda packages directory, keeping only the compressed archive cache and loose archive files.
Instead of recursively deleting each extracted folder (extremely slow on Windows due to filesystem overhead), we rename them to a sibling directory on the same filesystem. On self-hosted (persistent) runners, stash directories from previous runs are cleaned up before new ones are created.