Migrate fb-exported to meta-exported where possible (best effort) (#5809)

Summary:
Pull Request resolved: #5809

X-link: https://github.com/facebookresearch/FBGEMM/pull/2735

I'm about to remove fb-exported, so let's do this first.

Reviewed By: ndmitchell

Differential Revision: D107150080

fbshipit-source-id: 70598ddcb332219550bf5a0df9613a4bf68d2495

Author: bigfootjon

.github/metrics/datatypes.py

@@ -79,7 +79,7 @@ def cleaned(self):
         """
         Remove the labels that are common to the PR.
         """
-        misc = ["fb-exported", "cla signed", "ci-no-td", "Merged"]
+        misc = ["meta-exported", "fb-exported", "cla signed", "ci-no-td", "Merged"]
         new_labels = [x for x in self.labels if x not in misc]
         return dataclasses.replace(self, labels=new_labels)