Disable link order fixup until the perf fix is ready

Summary:
The change in D67197102 makes the link order in link groups consistent with the _regular_ link order. However, the implementation has a perf and memory impact that affects e.g. Glean indexing.

The perf fix is underway but until it's ready we should temporarily disable the link order fixup.

#buildall

Reviewed By: patskovn, iamirzhan

Differential Revision: D68074196

fbshipit-source-id: e04cbde765db3e5c7342dc430c2e67e875e1be98

cxx/link_groups.bzl

@@ -446,7 +446,7 @@ def get_filtered_labels_to_links_map(
         link_group_preferred_linkage,
         pic_behavior,
         roots,
-        fixup_link_order = link_strategy == LinkStrategy("shared"),
+        fixup_link_order = False,  # TODO(arr): re-enable when the perf fix D67982726 is ready
     )
 
     # An index of target to link group names, for all link group library nodes.