[NI] Continue resolution after unstable smart cast on receiver

The old inference cosideres candidates with unstable smartcast on
receiver unsuccessful, therefore another one may be selected.
KT-36264

compiler/testData/diagnostics/tests/smartCasts/elvis/impossible.kt

@@ -18,7 +18,7 @@ fun foo(list: StringList, arg: Unstable) {
     list.remove(arg.first)
     if (arg.first?.isEmpty() ?: false) {
         // Should be still resolved to extension, without smart cast or smart cast impossible
-        list.remove(<!OI;SMARTCAST_IMPOSSIBLE!>arg.first<!>)
+        list.remove(<!NI;SMARTCAST_IMPOSSIBLE, SMARTCAST_IMPOSSIBLE!>arg.first<!>)
     }
 }
 
@@ -36,6 +36,6 @@ fun bar(list: BooleanList, arg: UnstableBoolean) {
     list.remove(arg.first)
     if (arg.first ?: false) {
         // Should be still resolved to extension, without smart cast or smart cast impossible
-        list.remove(<!OI;SMARTCAST_IMPOSSIBLE!>arg.first<!>)
+        list.remove(<!NI;SMARTCAST_IMPOSSIBLE, SMARTCAST_IMPOSSIBLE!>arg.first<!>)
     }
 }

compiler/testData/diagnostics/tests/smartCasts/varnotnull/unnecessaryWithMap.fir.kt

@@ -1,3 +1,5 @@
+// !WITH_NEW_INFERENCE
+
 fun create(): Map<String, String> = null!!
 
 operator fun <K, V> Map<K, V>.iterator(): Iterator<Map.Entry<K, V>> = null!!

compiler/testData/diagnostics/tests/smartCasts/varnotnull/unnecessaryWithMap.kt

@@ -1,3 +1,5 @@
+// !WITH_NEW_INFERENCE
+
 fun create(): Map<String, String> = null!!
 
 operator fun <K, V> Map<K, V>.iterator(): Iterator<Map.Entry<K, V>> = null!!
@@ -13,7 +15,7 @@ class MyClass {
         m = create()
         // See KT-7428
         for ((k, v) in <!SMARTCAST_IMPOSSIBLE!>m<!>)
-            res += (k.length + v.length)
+            res <!NI;OVERLOAD_RESOLUTION_AMBIGUITY!>+=<!> (<!NI;DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>k<!>.<!NI;DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>length<!> <!NI;DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>+<!> <!NI;DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>v<!>.<!NI;DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>length<!>)
         return res
     }
 }