feat: Upgrade Ubuntu version for provisioning tests.

Author: dianakhuang

.github/workflows/provisioning-tests.yml

@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os:
-          - ubuntu-20.04 # Ubuntu 20.04 "Focal Fossa"
+          - ubuntu-24.04
         python-version: [ '3.11' ]
         services: [ discovery+lms+forum ,registrar+lms, ecommerce+lms, edx_notes_api+lms, credentials+lms, xqueue, analyticsapi+insights+lms, designer+lms, enterprise-subsidy+enterprise-catalog+enterprise-access+lms, license-manager+lms]
       fail-fast: false # some services can be flaky; let others run to completion even if one fails