Add CFI-ICALL to avoid crash in PipeWire functions

We already use RTC_NO_SANITIZE("cfi-icall") for most of the code and
it looks this one can be triggered recently with pw_loop_signal_event()
call.

Bug: webrtc:13659
Change-Id: I4dbb88f32de861e05be18254640db90b0f58c5e5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/261300
Reviewed-by: Mark Foltz <mfoltz@chromium.org>
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Commit-Queue: Mark Foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#36787}

modules/desktop_capture/linux/wayland/shared_screencast_stream.cc

@@ -520,6 +520,7 @@ DesktopVector SharedScreenCastStreamPrivate::CaptureCursorPosition() {
   return mouse_cursor_position_;
 }
 
+RTC_NO_SANITIZE("cfi-icall")
 void SharedScreenCastStreamPrivate::ProcessBuffer(pw_buffer* buffer) {
   spa_buffer* spa_buffer = buffer->buffer;
   ScopedBuf map;