Change to not expose exec artifacts (#5700)

Now that the artifact graph is built completely in Rust, these are an
implementation detail that shouldn't be exposed to TS.

rust/kcl-lib/src/execution/mod.rs

@@ -64,8 +64,6 @@ pub struct ExecOutcome {
     /// Operations that have been performed in execution order, for display in
     /// the Feature Tree.
     pub operations: Vec<Operation>,
-    /// Output map of UUIDs to artifacts.
-    pub artifacts: IndexMap<ArtifactId, Artifact>,
     /// Output commands to allow building the artifact graph by the caller.
     pub artifact_commands: Vec<ArtifactCommand>,
     /// Output artifact graph.

rust/kcl-lib/src/execution/state.rs

@@ -123,7 +123,6 @@ impl ExecState {
                 .map(|(k, v)| (k.clone(), v.clone()))
                 .collect(),
             operations: self.global.operations,
-            artifacts: self.global.artifacts,
             artifact_commands: self.global.artifact_commands,
             artifact_graph: self.global.artifact_graph,
             errors: self.global.errors,
@@ -146,7 +145,6 @@ impl ExecState {
                 .map(|(k, v)| (k.clone(), v.clone()))
                 .collect(),
             operations: Default::default(),
-            artifacts: Default::default(),
             artifact_commands: Default::default(),
             artifact_graph: Default::default(),
             errors: self.global.errors,