KT-11875 Moves code that uncovers the following JS function:

```
function foo (closureParam, closureParam2, ...) {
    return function() {
        // function body
    }
}
```

from FunctionContext to FunctionInlineMutator. The old code causes bug when calling this function like this: `foo(this, ...)`, since first `closureParam` is replaced with `this`. Later, FunctionInlineMutator can't make difference between original `this` inside *function body* and former `closureParam` reference that became `this` after replacement. So, let FunctionInlineMutator replace `this` in *function body* and then substitute closure parameters.

KT-11875 Fixed

js/js.translator/testData/inline/cases/innerOuterThis.kt

@@ -0,0 +1,19 @@
+package foo
+
+inline fun<T> with1(value: T, p: T.() -> Unit) = value.p()
+
+class A(val expected: String) {
+    val b = B()
+
+    fun foo(): A {
+        with1(b) {
+            y = expected
+        }
+        return this
+    }
+}
+class B() {
+    var y = ""
+}
+
+fun box() = A("OK").foo().b.y