streamclone: move requirement update into consumev2

This change was suggested by Gregory Szorc.

mercurial/bundle2.py

@@ -2155,11 +2155,3 b' def handlestreamv2bundle(op, part):'
     repo.ui.debug('applying stream bundle\n')
     streamclone.applybundlev2(repo, part, filecount, bytecount,
                               requirements)
-
-    # new requirements = old non-format requirements +
-    #                    new format-related remote requirements
-    # requirements from the streamed-in repository
-    repo.requirements = set(requirements) | (
-            repo.requirements - repo.supportedformats)
-    repo._applyopenerreqs()
-    repo._writerequirements()

mercurial/streamclone.py

@@ -632,3 +632,11 b' def applybundlev2(repo, fp, filecount, f'
                           ', '.join(sorted(missingreqs)))
 
     consumev2(repo, fp, filecount, filesize)
+
+    # new requirements = old non-format requirements +
+    #                    new format-related remote requirements
+    # requirements from the streamed-in repository
+    repo.requirements = set(requirements) | (
+            repo.requirements - repo.supportedformats)
+    repo._applyopenerreqs()
+    repo._writerequirements()