Summary:
X-link: https://github.com/facebookincubator/zstrong/pull/1228

ubuntu 24.04 fast float is too old and causes folly build to fail, so exclude it from system packages and build from source.

ubuntu 25.04 plucky is due to get an updated version so not removing the deb mapping entirely: https://launchpad.net/ubuntu/plucky/+source/fast-float

Reviewed By: bigfootjon

Differential Revision: D71213548

fbshipit-source-id: b1fd7c28360a476c766da1099e56fd2aa5df3d55