When running tempest we run in-tree tests as well. Lots of these
tests including tempest tests may not work with new client
libraries. Let's use the relevant branch upper constraints when
running functional tests.
Backport note:
Change I7d1017bcd7147329c4e187336daee1a1ae280fa9, which replaced f33
by f66, is merged into this backport to unblock CI.
Change-Id: I6a8cffdc86c895eebe4269c5cd37841325566c54
(cherry picked from commit 22c48f57bb)
(cherry picked from commit b95e6025f6)
(cherry picked from commit 92db02a56e)
(cherry picked from commit d05b683ef6)
87b40ed75e