cmd/evm, core/vm, internal/ethapi: Show error when exiting (#14985)

* cmd/evm, core/vm, internal/ethapi: Add 'err' to tracer interface CaptureEnd

* cmd/evm: fix nullpointer when there is no error

internal/ethapi/tracer.go

@@ -346,7 +346,7 @@ func (jst *JavascriptTracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode,
 }
 
 // CaptureEnd is called after the call finishes
-func (jst *JavascriptTracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration) error {
+func (jst *JavascriptTracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error {
 	//TODO! @Arachnid please figure out of there's anything we can use this method for
 	return nil
 }