add python 3.13 support (#10164)

fixes https://github.com/certbot/certbot/issues/10045. this is based on
the PR that did this for 3.12 at
https://github.com/certbot/certbot/pull/9852

this PR also removes python 3.8 from our tox config which should have
been done as part of https://github.com/certbot/certbot/pull/10077

.azure-pipelines/templates/jobs/extended-tests-jobs.yml

@@ -4,7 +4,7 @@ jobs:
       - name: IMAGE_NAME
         value: ubuntu-22.04
       - name: PYTHON_VERSION
-        value: 3.12
+        value: 3.13
       - group: certbot-common
     strategy:
       matrix:
@@ -17,6 +17,9 @@ jobs:
         linux-py311:
           PYTHON_VERSION: 3.11
           TOXENV: py311
+        linux-py312:
+          PYTHON_VERSION: 3.12
+          TOXENV: py312
         linux-isolated:
           TOXENV: 'isolated-acme,isolated-certbot,isolated-apache,isolated-cloudflare,isolated-digitalocean,isolated-dnsimple,isolated-dnsmadeeasy,isolated-gehirn,isolated-google,isolated-linode,isolated-luadns,isolated-nsone,isolated-ovh,isolated-rfc2136,isolated-route53,isolated-sakuracloud,isolated-nginx'
         linux-integration-certbot-oldest:
@@ -34,7 +37,10 @@ jobs:
         linux-py311-integration:
           PYTHON_VERSION: 3.11
           TOXENV: integration
-        # python 3.12 integration tests are not run here because they're run as
+        linux-py312-integration:
+          PYTHON_VERSION: 3.12
+          TOXENV: integration
+        # python 3.13 integration tests are not run here because they're run as
         # part of the standard test suite
         nginx-compat:
           TOXENV: nginx_compat

.azure-pipelines/templates/jobs/standard-tests-jobs.yml

@@ -1,7 +1,7 @@
 jobs:
   - job: test
     variables:
-      PYTHON_VERSION: 3.12
+      PYTHON_VERSION: 3.13
     strategy:
       matrix:
         macos-cover: