Drop python 3.10
Due to constraints update(rpds-py) in requirements, Tempest master stopped
working on python 3.10.

https://review.opendev.org/c/openstack/requirements/+/990790

Due to same reason, Tempest needs to drop the python 3.10 support[1].
Because Tempest master cannot support py3.10 anymore, it needs to be
dropped from tempest plugins also.
[1] https://review.opendev.org/c/openstack/tempest/+/991161
Change-Id: I0b0a5572cd920d008c5e9d8ec1578c3eea73dc3e
Signed-off-by: Ghanshyam Maan gmaan.os14@gmail.com