[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/arrays/arraySet.kt

@@ -0,0 +1,31 @@
+// ISSUE: KT-37516
+
+class A<T> {
+    operator fun get(index: Int): T = null!!
+    operator fun set(index: Int, value: T) {}
+}
+
+class B {
+    operator fun plusAssign(other: B) {}
+}
+
+class C {
+    operator fun plus(other: C): C = this
+}
+
+class D {
+    operator fun plusAssign(other: D) {}
+    operator fun plus(other: D): D = this
+}
+
+fun test_1(a: A<B>) {
+    a[0] = B() // set
+}
+
+fun test_2(a: A<C>) {
+    a[0] = C() // set
+}
+
+fun test_3(a: A<D>) {
+    a[0] = D() // set
+}