Merge pull request #65943 from apple/egorzhdan/std-vector-ubi-test

[cxx-interop] Do not run a test in C++20 mode

Author: egorzhdan

test/Interop/Cxx/stdlib/use-std-vector.swift

@@ -1,5 +1,6 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
-// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop -Xcc -std=gnu++20)
+// FIXME: also run in C++20 mode when conformance works properly on UBI platform (rdar://109366764):
+// %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop -Xcc -std=gnu++20)
 //
 // REQUIRES: executable_test
 //