Test / Create distribution (push) Successful in 56s
Test / Sandbox (push) Successful in 2m54s
Test / Hakurei (push) Successful in 4m33s
Test / Sandbox (race detector) (push) Successful in 6m5s
Test / Hakurei (race detector) (push) Successful in 8m0s
Test / ShareFS (push) Successful in 8m32s
Test / Flake checks (push) Successful in 1m27s
This replaces all xz invocations with the native decompressor. This also significantly cleans up the Gentoo stage3 bootstrap path. Signed-off-by: Ophestra <cat@gensokyo.uk>