[NI] Relax requirement for stub types in builder-inference

For functions with implicit return type annotations will be replaced
 anyway in order to initialize return type, so this restriction in
 `StubType` was too strong

 #KT-30656 Fixed

compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/incorrectCalls.kt

@@ -28,10 +28,10 @@ val test2 = generate {
 
 val test3 = <!OI;TYPE_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>generate<!> {
     yield(3)
-    yieldBarReturnType(3)
+    <!NI;NON_APPLICABLE_CALL_FOR_BUILDER_INFERENCE!>yieldBarReturnType(3)<!>
 }
 
 val test4 = <!OI;TYPE_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>generate<!> {
     yield(3)
-    barReturnType()
+    <!NI;NON_APPLICABLE_CALL_FOR_BUILDER_INFERENCE!>barReturnType()<!>
 }

compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/incorrectCalls.ni.txt

@@ -4,7 +4,7 @@ public val test1: kotlin.collections.List<kotlin.Int>
 public val test2: kotlin.collections.List<kotlin.Int>
 public val test3: kotlin.collections.List<kotlin.Int>
 public val test4: kotlin.collections.List<kotlin.Int>
-public fun </*0*/ S> generate(/*0*/ g: suspend GenericController<S>.() -> kotlin.Unit): kotlin.collections.List<S>
+public fun </*0*/ S> generate(/*0*/ @kotlin.BuilderInference g: suspend GenericController<S>.() -> kotlin.Unit): kotlin.collections.List<S>
 
 public final class GenericController</*0*/ T> {
     public constructor GenericController</*0*/ T>()

core/descriptors/src/org/jetbrains/kotlin/types/StubType.kt

@@ -24,9 +24,7 @@ class StubType(
     override val annotations: Annotations
         get() = Annotations.EMPTY
 
-    override fun replaceAnnotations(newAnnotations: Annotations): SimpleType {
-        error("Shouldn't be called on non-fixed type")
-    }
+    override fun replaceAnnotations(newAnnotations: Annotations): SimpleType = this
 
     override fun makeNullableAsSpecified(newNullability: Boolean): SimpleType {
         return if (newNullability == isMarkedNullable)