refactor(tvix/eval): Construct globals in EvaluationBuilder::build

Construct the Rc<GlobalsMap> for the evaluation as part of
EvaluiationBuilder::build, rather than deferring it until we actually
compile. This changes nothing functionally, but gets us one step closer
to sharing this globals map across evaluations.

Change-Id: Id92e9fb88d974d763056d4f15ce61962ab776e84
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11957
Tested-by: BuildkiteCI
Autosubmit: aspen <root@gws.fyi>
Reviewed-by: flokli <flokli@flokli.de>

tvix/eval/src/compiler/mod.rs

@@ -44,11 +44,6 @@ pub struct CompilationOutput {
     pub lambda: Rc<Lambda>,
     pub warnings: Vec<EvalWarning>,
     pub errors: Vec<Error>,
-
-    // This field must outlive the rc::Weak reference which breaks the
-    // builtins -> import -> builtins reference cycle. For this
-    // reason, it must be passed to the VM.
-    pub globals: Rc<GlobalsMap>,
 }
 
 /// Represents the lambda currently being compiled.
@@ -1689,6 +1684,5 @@ pub fn compile(
         lambda,
         warnings: c.warnings,
         errors: c.errors,
-        globals,
     })
 }