Updates to enable jammy and finalise charmcraft builds

- Add 22.04 to charmcraft.yaml
- Update metadata to include jammy
- Remove impish from metadata
- Update osci.yaml to include py3.10 default job
- Modify tox.ini to remove py35,py36,py37 tox target and add py310
  target.

Change-Id: Ia9a713625aa933fe99722df36f42a800af19c790

.zuul.yaml

@@ -1,4 +1,3 @@
 - project:
     templates:
-      - python35-charm-jobs
-      - openstack-python3-ussuri-jobs
+      - openstack-python3-charm-yoga-jobs

charmcraft.yaml

@@ -20,7 +20,15 @@ parts:
       - README.md
 
 bases:
-  - name: ubuntu
-    channel: "20.04"
-    architectures:
-      - amd64
+  - build-on:
+      - name: ubuntu
+        channel: "20.04"
+        architectures:
+          - amd64
+    run-on:
+      - name: ubuntu
+        channel: "20.04"
+        architectures: [amd64, s390x, ppc64el, arm64]
+      - name: ubuntu
+        channel: "22.04"
+        architectures: [amd64, s390x, ppc64el, arm64]

metadata.yaml

@@ -18,7 +18,7 @@ tags:
 - misc
 series:
 - focal
-- impish
+- jammy
 provides:
   nrpe-external-master:
     interface: nrpe-external-master

osci.yaml

@@ -1,7 +1,7 @@
 - project:
     templates:
       - charm-unit-jobs-py38
-      - charm-unit-jobs-py39
+      - charm-unit-jobs-py310
       - charm-xena-functional-jobs
       - charm-yoga-functional-jobs
     vars:

tox.ini

@@ -51,8 +51,8 @@ commands =
     charmcraft -v build
     {toxinidir}/rename.sh
 
-[testenv:py35]
-basepython = python3.5
+[testenv:py3]
+basepython = python3
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
@@ -60,26 +60,25 @@ deps = -r{toxinidir}/requirements.txt
 basepython = python3.6
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-
-[testenv:py37]
-basepython = python3.7
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
+commands = stestr run --slowest {posargs}
 
 [testenv:py38]
 basepython = python3.8
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
+commands = stestr run --slowest {posargs}
 
 [testenv:py39]
 basepython = python3.9
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
+commands = stestr run --slowest {posargs}
 
-[testenv:py3]
-basepython = python3
+[testenv:py310]
+basepython = python3.10
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
+commands = stestr run --slowest {posargs}
 
 [testenv:pep8]
 basepython = python3