Delay ForbidInferringPostponedTypeVariableIntoDeclaredUpperBound to 2.0

#KT-57395 Fixed
Related to KT-47986

compiler/testData/diagnostics/tests/inference/builderInference/kt47986_2.fir.kt

@@ -0,0 +1,14 @@
+// !RENDER_DIAGNOSTICS_FULL_TEXT
+class Foo<K>
+
+fun <K> buildFoo(builderAction: Foo<K>.() -> Unit): Foo<K> = Foo()
+
+fun <L> Foo<L>.bar() {}
+
+fun <K> id(x: K) = x
+
+fun main() {
+    val x = <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>buildFoo<!> { // can't infer
+        val y = id(::bar)
+    }
+}