[FIR] Allow annotation instantiation.

This commit disables the frontend error reporting for supported cases.

compiler/testData/codegen/box/annotations/instances/annotationFromStdlib.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // IGNORE_BACKEND: JVM
 // IGNORE_BACKEND: WASM
 // DONT_TARGET_EXACT_BACKEND: JS
@@ -14,4 +13,4 @@ fun box(): String {
     val actualToString = ann1.toString()
     if (actualToString != expectedToString) return "Expected ann1.toString() equals to $expectedToString, but it's $actualToString"
     return "OK"
-}
+}