fix(tvix/eval): avoid forcing with-target until absolutely necessary

Change-Id: I00efbbb8b9d3d22f32becf0919c6adf1be8b4b69
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6465
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>

tvix/eval/src/compiler/mod.rs

@@ -862,7 +862,6 @@ impl Compiler<'_, '_> {
         // resolve that directly (thus avoiding duplication on the
         // stack).
         self.compile(slot, node.namespace().unwrap());
-        self.emit_force(&node.namespace().unwrap());
 
         let span = self.span_for(&node.namespace().unwrap());