[FIR] Extract LHS receiver of assignment operator statements

#KT-53490 Fixed

js/js.translator/testData/box/expression/evaluationOrder/assignToDotQualifiedWithSideEffect.kt

@@ -1,62 +0,0 @@
-// IGNORE_BACKEND_K2: JS_IR
-// FIR_STATUS: KT-53490
-// EXPECTED_REACHABLE_NODES: 1286
-package foo
-
-var global: String = ""
-
-class A {
-    var prop: Int = 0
-}
-
-fun bar(s: String, a: A): A {
-    global += s
-    return a
-}
-
-
-fun box(): String {
-    val a = A()
-
-    global = ""
-    bar("A", a).prop = try { global += "B"; 10 } finally {}
-    assertEquals("AB", global)
-    assertEquals(10, a.prop)
-
-    global = ""
-    bar("A", a).prop += try { global += "B"; 20 } finally {}
-    assertEquals("AB", global)
-    assertEquals(30, a.prop)
-
-    global = ""
-    bar("A", a).prop -= try { global += "B"; 20 } finally {}
-    assertEquals("AB", global)
-    assertEquals(10, a.prop)
-
-    global = ""
-    bar("A", a).prop *= try { global += "B"; 2 } finally {}
-    assertEquals("AB", global)
-    assertEquals(20, a.prop)
-
-    global = ""
-    bar("A", a).prop /= try { global += "B"; 5 } finally {}
-    assertEquals("AB", global)
-    assertEquals(4, a.prop)
-
-    global = ""
-    bar("A", a).prop %= try { global += "B"; 3 } finally {}
-    assertEquals("AB", global)
-    assertEquals(1, a.prop)
-
-    global = ""
-    (try { bar("A", a) } finally {}).prop++
-    assertEquals("A", global)
-    assertEquals(2, a.prop)
-
-    global = ""
-    ++(try { bar("A", a) } finally {}).prop
-    assertEquals("A", global)
-    assertEquals(3, a.prop)
-
-    return "OK"
-}

js/js.translator/testData/box/expression/evaluationOrder/reassignmentLhsCaching.kt

@@ -1,58 +0,0 @@
-// IGNORE_BACKEND_K2: JS_IR
-// FIR_STATUS: KT-53490
-// EXPECTED_REACHABLE_NODES: 1298
-package foo
-
-var log = ""
-
-class A(val value: Int) {
-    operator fun plus(other: A): A {
-        log += "A.plus(${other.value});"
-        return A(value + other.value)
-    }
-}
-
-val _array = arrayOf(A(2))
-
-fun getArray(): Array<A> {
-    log += "getArray();"
-    return _array
-}
-
-fun getArrayIndex(): Int {
-    log += "getArrayIndex();"
-    return 0
-}
-
-class B(value: Int) {
-    var a = A(value)
-}
-
-val _property = B(10)
-val _functionResult = B(100)
-
-val foo: B
-    get() {
-        log += "foo;"
-        return _property
-    }
-
-fun bar(): B {
-    log += "bar();"
-    return _functionResult
-}
-
-fun box(): String {
-    getArray()[getArrayIndex()] += A(3)
-    assertEquals(5, _array[0].value)
-
-    foo.a += A(20)
-    assertEquals(30, _property.a.value)
-
-    bar().a += A(200)
-    assertEquals(300, _functionResult.a.value)
-
-    assertEquals("getArray();getArrayIndex();A.plus(3);foo;A.plus(20);bar();A.plus(200);", log)
-
-    return "OK"
-}