Follow-up tasks for TPL CI improvements

@kennyweiss is already working on this.

Since Dec 13, 2021.

@keithhealy has significantly improved our CI testing by adding docker images with pre-built TPLs (#155 )

This issue tracks some unresolved tasks:
- [x] Build ``RAJA`` directly using our uberenv. @keithhealy ran into trouble building ``RAJA`` through docker and our current dockerfile's are building ``RAJA`` separately.
- [ ] Generate TPLs for our ``Windows`` config on azure (@agcapps is working on this) and re-enable ``sidre`` for this config
- [ ] Add unit test to ``Windows`` config on azure
- [ ] Generate TPL's for our ``OS X`` builds, and re-enable ``sidre`` for this config.
- [x] Ensure that azure marks a build as failing if it fails unit tests. In the current iteration, this does not appear to be the case (see: https://dev.azure.com/axom/axom/_build/results?buildId=877&view=ms.vss-test-web.build-test-results-tab , where the ``sidre_lulesh`` tests are failing on the gcc configurations, but azure/github says that all checks are passing)
- [x] Fix ``sidre_lulesh`` test on gcc configurations. Perhaps reducing the number of threads on the ctest invocation would help? E.g. change ``j10`` to ``j8`` (or lower)
- [x] Update clang configurations to clang 8 and clang 9, instead of clang 4, 5 and 6 (per @rhornung67's request)
- [x] Update clang compiler images to include a working gfortran (@davidbeckingsale ?)
- [ ] Consider removing ``docker_`` prefix from docker host-configs, since they are already located in the ``docker/`` directory (per @gzagaris's request)