[FIR] Extract non-null info from x?.y!! ^KT-44513 Fixed

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

@@ -1,41 +0,0 @@
-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<!UNNECESSARY_SAFE_CALL!>?.<!>foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-    x?.b!!.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-    // x?.b is not null
-    x<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>.b<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-
-    y?.nb?.foo()!!
-    y!!.nb?.foo()!!
-    z?.nb!!.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-    // z?.nb is not null
-    z<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>.nb!!.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-
-    w.b<!UNNECESSARY_SAFE_CALL!>?.<!>foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-    w.b<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-    w.nb?.foo()!!
-    w.nb!!.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-
-    v!!.b.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
-}
-
-fun B?.bar(): Int = 1
-fun B?.baz(): Int? = 1
-
-fun doInt(i: Int) = i
-
-fun test(a: A?) {
-    doInt(a?.b.bar()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>)
-    doInt(a?.b.baz()!!)
-}