Remove Ubuntu Jammy job

Ubuntu Jammy is no longer part of the supported operating systems in
favor of Ubuntu Noble.

Change-Id: I0adc71a9835df0efaee2e1fadfad9fbe427ba009
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

Author: kajinamit

.zuul.yaml

@@ -35,8 +35,6 @@
     check:
       jobs:
         - magnum-tempest-plugin-tests-api
-        - magnum-tempest-plugin-tests-api-jammy
     gate:
       jobs:
         - magnum-tempest-plugin-tests-api
-        - magnum-tempest-plugin-tests-api-jammy