fix(tvix/eval): path resolution errors are catchable

Despite this not being documented, `tryEval` is empirically able to
catch errors caused by a <...> path not resolving (and nixpkgs depends
on this).

Change-Id: Ia3b78a2d9d2d0c603aba829518b351102dc55396
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6926
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI

tvix/eval/src/errors.rs

@@ -162,7 +162,7 @@ impl ErrorKind {
     /// Returns `true` if this error can be caught by `builtins.tryEval`
     pub fn is_catchable(&self) -> bool {
         match self {
-            Self::Throw(_) | Self::AssertionFailed => true,
+            Self::Throw(_) | Self::AssertionFailed | Self::PathResolution(_) => true,
             Self::ThunkForce(err) => err.kind.is_catchable(),
             _ => false,
         }