remove system-installed UCX headers in wheel build environment

[jameslamb]

Contributes to rapidsai/build-planning#57.

Follow-up to #226.

Proposes the following changes for wheel builds:

• removing system-installed UCX headers
• making the code to remove system-installed UCX libraries a bit more specific
  • (to minimize the risk of accidentally deleting some non-UCX thing who name matches the pattern libuc*)

Notes for Reviewers

Before applying similar changes to ucx-py, I noticed it being compiled with the system-installed headers but then linking against the libraries provided by the libucx wheels: rapidsai/ucx-py#1041 (comment)

This change should reduce the risk of that happening.

How I tested this

Poked around the filesystem that build_wheel.sh runs in by pulling one of our standard wheel-building container images used in CI.

docker run \
    --rm \
    -v $(pwd):/opt/work \
    -w /opt/work \
    -it rapidsai/ci-wheel:cuda12.2.2-rockylinux8-py3.10 \
    bash

find /usr -type f -name 'libucm*'
# /usr/lib64/libucm.la
# /usr/lib64/libucm.a
# /usr/lib64/libucm.so.0.0.0
# /usr/lib64/ucx/libucm_cuda.a
# /usr/lib64/ucx/libucm_cuda.la
# /usr/lib64/ucx/libucm_cuda.so.0.0.0

find /usr -type d -name 'uct'
# /usr/include/uct

[vyasr]

I considered suggesting this when I was reviewing the ucx-py PR but decided I wasn't too worried because ucxx is a CMake-driven build so all the paths will be set correctly at once (unlike ucx-py, which uses setuptools and you have to do this more manually) so I didn't want to make work for you. It doesn't hurt though, so thanks!

[vyasr]

/merge