Allow install FIPS versions

[drootsad]

Is your feature request related to a problem? Please describe.

• Unable to use this asdf plugin to install FIPS builds

Describe the solution you'd like

• List the FIPS builds as well and be able to install them

Describe alternatives you've considered

• Manually managing teleport binaries

Additional context

• The FIPS builds sit in the same CDN location as the Non-FIPS builds. We just need a way to specify FIPS versions to be downloaded/installed. Unfortunately the files are named a bit differently between fips/non-fips versions for example:

non-FIPS version: https://cdn.teleport.dev/teleport-ent-${VERSION?}-linux-${SYSTEM_ARCH?}-bin.tar.gz
FIPS version: https://cdn.teleport.dev/teleport-ent-${VERSION?}-linux-${SYSTEM_ARCH?}-fips-bin.tar.gz

• Official teleport documentation regarding FIPS builds found here: https://goteleport.com/docs/installation/#downloading-packages-and-tar-archives

[drootsad]

on deeper inspection of how you're pulling the version list, listing the fips versions probably will not work (as you're looking at the over-arching git repo for teleport-enterprise release versions and not the client releases themselves). I'm not 100% positive if there are FIPS builds for all released versions (and if there are, how far back they go as well)... so maybe listing a fips build version isn't the most important feature, but possibly specifying -fips in the version would be able to construct the download URL for the FIPS build and use that instead?

AFAICT FIPS builds are basically the same except built with the boringcrypto SSL libraries