patchelf: 0.10 -> 0.9 (downgrade!)

This is a partial revert of #58715.  Bumping the default caused problems
described in #69213.  I tested that the vscode corruption happened even
with the 0.10 pre-release, so I'm keeping patchelfUnstable on 0.10
(patchelfUnstable shouldn't cause a large rebuild anyway)