policybuilder: Mark AllowInotifyInit deprecated.

We have replaced it with `AllowInotify` which also allowlists the remaining syscalls for the inotify API.

PiperOrigin-RevId: 807240737
Change-Id: I442ee89c3709ba6c8e67d48791d425b44e5c4b26

Author: okunz

sandboxed_api/sandbox2/policybuilder.h

@@ -237,6 +237,7 @@ class PolicyBuilder final {
   // Allows these syscalls:
   // - inotify_init
   // - inotify_init1
+  ABSL_DEPRECATED("Use AllowInotify() instead.")
   PolicyBuilder& AllowInotifyInit();
 
   // Appends code to allow the inotify API.