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/capturedInChainOfInlineFuns.kt

@@ -0,0 +1,16 @@
+// WITH_RUNTIME
+
+fun test() {
+    var x = 0
+    run {
+        run {
+            run {
+                ++x
+            }
+        }
+    }
+}
+
+// 0 NEW
+// 0 GETFIELD
+// 0 PUTFIELD