FIR: implement FE1.0-matching ILT approximation during inference

#KT-51357 Fixed

compiler/testData/diagnostics/testsWithStdLib/greater.fir.kt

@@ -1,12 +0,0 @@
-class Expression<T>(val x: T)
-
-class GreaterOp(val expr1: Expression<*>, val expr2: Expression<*>)
-
-fun <T : Comparable<T>, S : T?> Expression<in S>.greater(other: T): GreaterOp =
-    GreaterOp(this, Expression(other))
-
-fun foo(countExpr: Expression<Long>) {
-    <!NEW_INFERENCE_ERROR!>countExpr.greater(0)<!>
-    countExpr.greater("0")
-    countExpr.greater<String, Nothing>("0")
-}

compiler/testData/diagnostics/testsWithStdLib/greater.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 class Expression<T>(val x: T)
 
 class GreaterOp(val expr1: Expression<*>, val expr2: Expression<*>)