[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/inference/nestedCalls/makeNullableIfSafeCall.fir.kt

@@ -0,0 +1,41 @@
+package a
+
+interface A {
+    val b: B
+    val nb: B?
+}
+
+interface B {
+    fun foo(): Int
+}
+
+fun test(u: A?, x: A?, y: A?, z: A?, w: A, v: A?) {
+    u?.b?.foo()!! // was UNNECESSARY_SAFE_CALL everywhere, because result type (of 'foo()') wasn't made nullable
+    u!!.b?.foo()!!
+    x?.b!!.foo()!!
+    // x?.b is not null
+    x!!.b!!.foo()!!
+
+    y?.nb?.foo()!!
+    y!!.nb?.foo()!!
+    z?.nb!!.foo()!!
+    // z?.nb is not null
+    z!!.nb!!.foo()!!
+
+    w.b?.foo()!!
+    w.b!!.foo()!!
+    w.nb?.foo()!!
+    w.nb!!.foo()!!
+
+    v!!.b.foo()!!
+}
+
+fun B?.bar(): Int = 1
+fun B?.baz(): Int? = 1
+
+fun doInt(i: Int) = i
+
+fun test(a: A?) {
+    doInt(a?.b.bar()!!)
+    doInt(a?.b.baz()!!)
+}