Speedup the Free Disk Space CI step

[alexisfontaine]

The Free Disk Space job in CI is a significant bottleneck (~5min on hundreds of jobs per workflow). This change replaces rm -rf command with rmz, which is apparently faster at deleting large directories.

If preferred, I can try the more conventional find -delete command instead of adding a dependency.

[mohe2015]

How does the performance compare with find?

[alexisfontaine]

You're right to question that claim – I hadn't actually benchmarked rmz or find. My apologies for stating it without verification.

I've been looking into how the Rust project currently handles this, and it seems they've built their own script based on the free-disk-space action.

Interestingly, there's a PR on that action (jlumbroso/free-disk-space#26) with some numbers. It seems benchmarking the different commands within the Leptos CI environment is the best way to determine if it's actually an improvement.