fix(tvix/eval): make compare_strict_eval_tests use Strict

Previously, compare_strict_eval_tests() was using Strictness::Lazy.
This appears to be a minor oversight from
0ab6494286.

This commit corrects that, by changing Strictness::Lazy to
Strictness::Strict.

Change-Id: Ia2389a5d30481cd322ed55230731340b795e5d87
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9282
Tested-by: BuildkiteCI
Autosubmit: Adam Joseph <adam@westernsemico.com>
Reviewed-by: sterni <sternenseemann@systemli.org>

tvix/eval/tests/nix_oracle.rs

@@ -82,7 +82,7 @@ macro_rules! compare_eval_tests {
 
 macro_rules! compare_strict_eval_tests {
     ($($tests:tt)*) => {
-        compare_eval_tests!(Strictness::Lazy, { $($tests)* });
+        compare_eval_tests!(Strictness::Strict, { $($tests)* });
     }
 }