configure option `--with-prrte=internal` is ignored when an external, valid PRRTE version is found in PATH etc. ## Background information ### What version of Open MPI are you using? (e.g., v4.1.6, v5.0.1, git branch name and hash, etc.) Visible in `main` and `v5.x` ### Fix This is a simple error in `config/ompi_setup_prrte.m4`, fix incoming