KT-5248 Don't wrap variable if it is captured only in inlined closures

Remove non-escaping Ref's on bytecode postprocessing pass.

compiler/testData/codegen/bytecodeText/capturedVarsOptimization/capturedInLocalObject.kt

@@ -0,0 +1,15 @@
+// WITH_RUNTIME
+
+fun test() {
+    var x = 0
+    run {
+        val obj = object {
+            fun foo() { ++x }
+        }
+        obj.foo()
+    }
+}
+
+// 1 NEW kotlin/jvm/internal/Ref\$IntRef
+// 2 GETFIELD kotlin/jvm/internal/Ref\$IntRef\.element
+// 2 PUTFIELD kotlin/jvm/internal/Ref\$IntRef\.element