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/capturedVarsOfSize2.kt

@@ -0,0 +1,25 @@
+// WITH_RUNTIME
+
+fun box(): String {
+    var xl = 0L     // Long, size 2
+    var xi = 0      // Int, size 1
+    var xd = 0.0    // Double, size 2
+
+    run {
+        xl++
+        xd += 1.0
+        xi++
+    }
+
+    run {
+        run {
+            xl++
+            xd += 1.0
+            xi++
+        }
+    }
+
+    return "OK"
+}
+
+// 0 NEW