KT-12628: replace infix call supports now array accesses too

(cherry picked from commit 3d67f84)

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeGet.kt

@@ -0,0 +1,4 @@
+// "Replace with safe (?.) call" "true"
+
+operator fun Int.get(row: Int, column: Int) = this
+fun foo(arg: Int?) = arg<caret>[42, 13]

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeGet.kt.after

@@ -0,0 +1,4 @@
+// "Replace with safe (?.) call" "true"
+
+operator fun Int.get(row: Int, column: Int) = this
+fun foo(arg: Int?) = arg?.get(42, 13)

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeSet.kt

@@ -0,0 +1,6 @@
+// "Replace with safe (?.) call" "true"
+
+operator fun Int.set(row: Int, column: Int, value: Int) {}
+fun foo(arg: Int?) {
+    arg<caret>[42, 13] = 0
+}

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeSet.kt.after

@@ -0,0 +1,6 @@
+// "Replace with safe (?.) call" "true"
+
+operator fun Int.set(row: Int, column: Int, value: Int) {}
+fun foo(arg: Int?) {
+    arg?.set(42, 13, 0)
+}