Updates for py312 compatibility

- Removed pins to old version of setuptools.
- Added py312 section to tox.ini [testenv]
- Updated flake8 to 7.1.1 instead of 3.9.2

Change-Id: I03d9366684dccfbb8ec5d29b227b055e42f306f9

src/wheelhouse.txt

@@ -15,10 +15,6 @@ cryptography
 pyrsistent<0.18.0
 iso8601<1.0.0
 
-importlib-metadata==4.3.0
-importlib-resources<3.0.0
-setuptools<60.9.0
-
 git+https://github.com/openstack/charms.openstack.git#egg=charms.openstack
 
 git+https://github.com/juju/charm-helpers.git#egg=charmhelpers

test-requirements.txt

@@ -4,7 +4,6 @@
 #     https://github.com/openstack-charmers/release-tools
 #
 pyparsing<3.0.0  # aodhclient is pinned in zaza and needs pyparsing < 3.0.0, but cffi also needs it, so pin here.
-setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
 
 stestr>=2.2.0
 

tox.ini

@@ -67,9 +67,14 @@ basepython = python3.10
 deps = -r{toxinidir}/test-requirements.txt
 commands = stestr run --slowest {posargs}
 
+[testenv:py312]
+basepython = python3.12
+deps = -r{toxinidir}/test-requirements.txt
+commands = stestr run --slowest {posargs}
+
 [testenv:pep8]
 basepython = python3
-deps = flake8==3.9.2
+deps = flake8==7.1.1
        git+https://github.com/juju/charm-tools.git
 commands = flake8 {posargs} src unit_tests