Python 3.11 support + update RedHat CPack (#254)

* Fixes for Python 3.11

* Add python 3.11 to scripts

- also tweak to to{upper,lower} bash functions

* Fix PAPI RPM packaging in RedHat

- fix error from #!/usr/bin/python in papi_hl_output_writer.py
  - requires either python2 or python3 instead of python

* cpack updates

- only generate STGZ for RedHat
- support `--generators` arg in build-release.sh
- support 7z, zip, and other zip generators
- fix build-release.sh with `--mpi`
- support setting CONDA_ROOT

* Support rhel/fedora/centos in omnitrace-install.py

* RedHat status badge

* Fix support for Python 3.11 + tweak ubuntu ci

- Remove installing clang and mpich in Ubuntu CI container
- Fallback on conda-forge for Python 3.11
- Enable entrypoint-rhel.sh for RHEL CI
- Pull latest container by default

* Update ElfUtils and PAPI builds

- quieter build output
- disable-nls for ElfUtils
- use -s flag for make

* Development Guide Docs

source/docs/index.md

@@ -20,4 +20,5 @@
    user_api
    python
    youtube
+   development
 ```