optimize: remove {StepResult,TailResult}::ForceThunk

fix-vm/src/instructions/calls.rs

@@ -10,8 +10,8 @@ impl<'gc> crate::Vm<'gc> {
         ctx: &mut impl crate::VmContext,
         reader: &mut BytecodeReader<'_>,
         mc: &Mutation<'gc>,
-    ) -> StepResult<'gc> {
-        if let Some(step) = self.try_force_resolved(0, reader.inst_start_pc(), mc) {
+    ) -> StepResult {
+        if let Some(step) = self.try_force(0, reader, mc) {
             return step;
         }
         if self.call_depth > 10000 {
@@ -50,7 +50,7 @@ impl<'gc> crate::Vm<'gc> {
         ctx: &mut impl crate::VmContext,
         reader: &mut BytecodeReader<'_>,
         mc: &Mutation<'gc>,
-    ) -> StepResult<'gc> {
+    ) -> StepResult {
         self.handle_return(reader, ctx, mc)
     }
 
@@ -59,7 +59,7 @@ impl<'gc> crate::Vm<'gc> {
         reader: &mut BytecodeReader<'_>,
         ctx: &C,
         mc: &Mutation<'gc>,
-    ) -> StepResult<'gc> {
+    ) -> StepResult {
         let ret_inst_pc = reader.pc() - 1;
         let Some(CallFrame {
             pc: ret_pc,