In etc/system_perf.yml and etc/longevity.yml, call infrastructure_provisioning.py instead of infrastructure_provisioning.sh.

Note that as part of this ticket there's also an opportunity to simplify/shorten those files. Instead of each step being their own function like "prepare environment", "infrastructure provisioning" etc... It should be possible to have only one or a few sections to deploy the cluster and run the test, and analyze step needs to remain a separate function.

Example (sketch):

functions:
  "prepare environment":
     # maybe leave as is
  "deploy cluster and run tests":
    - command: shell.exec
      params:
          working_dir: work
          script: |
              set -e
              set -v
              source dsienv.sh
              virtualenv ./venv
              infrastructure_provisioning.py
              mongodb_setup.py
              run_test.py
              make_artifact.sh # (possibly could rather go into analyze, to be discussed)