Update test affected by SafeCallsAreAlwaysNullable feature

compiler/testData/diagnostics/tests/SafeCallNonNullReceiver.kt

@@ -1,4 +1,5 @@
 // FIR_IDENTICAL
+// !LANGUAGE: -SafeCallsAreAlwaysNullable
 // http://youtrack.jetbrains.net/issue/KT-418
 
 fun ff() {

compiler/testData/diagnostics/tests/SafeCallNonNullReceiver2.kt

@@ -0,0 +1,7 @@
+// FIR_IDENTICAL
+// http://youtrack.jetbrains.net/issue/KT-418
+
+fun ff() {
+    val i: Int = 1
+    val a: Int? = i<!UNNECESSARY_SAFE_CALL!>?.<!>plus(2)
+}

compiler/testData/diagnostics/tests/SafeCallNonNullReceiver2.txt

@@ -0,0 +1,3 @@
+package
+
+public fun ff(): kotlin.Unit

compiler/testData/diagnostics/tests/controlFlowAnalysis/throwInLambda.fir.kt

@@ -1,3 +1,4 @@
+// !LANGUAGE: -SafeCallsAreAlwaysNullable
 // See KT-10913 Bogus unreachable code warning
 
 fun fn() : String? = null

compiler/testData/diagnostics/tests/controlFlowAnalysis/throwInLambda.kt

@@ -1,3 +1,4 @@
+// !LANGUAGE: -SafeCallsAreAlwaysNullable
 // See KT-10913 Bogus unreachable code warning
 
 fun fn() : String? = null

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

@@ -11,7 +11,7 @@ interface B {
 
 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!>!!<!>
+    u!!.b<!UNNECESSARY_SAFE_CALL!>?.<!>foo()!!
     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!>!!<!>
@@ -22,7 +22,7 @@ fun test(u: A?, x: A?, y: A?, z: A?, w: A, v: A?) {
     // 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_SAFE_CALL!>?.<!>foo()!!
     w.b<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
     w.nb?.foo()!!
     w.nb!!.foo()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>