Migrate to Python 3.14 and use confluent-docker-utils branch#1195

Abhishek Krishna (abh1sh5k) wants to merge 8 commits into7.9.xconfluentinc/common-docker:7.9.xfrom

feature/python3.14-docker-utils-branchconfluentinc/common-docker:feature/python3.14-docker-utils-branchCopy head branch name to clipboard