WIP: prevent path conflicts

[AyodeAwe]

Contributes to rapidsai/build-planning#54

This will make builds fail when there are path conflicts

[jameslamb]

This is currently failing with the following conflicts.

(I've included just 1 example of each type below)

(CUDA 11.8 build log) (CUDA 12.2 build log)

1. fmt and rmm issues (conflicting packages: conda-forge/fmt, conda-forge/spdlog, librmm)

Described in rapidsai/rmm#1508 (comment).

2. (CUDA 11.x only) CUDA toolkit packages packaged differently (conflicting packages: nvidia/cuda-nvtx, conda-forge/cudatoolkit)

This transaction has incompatible packages due to a shared path.
 packages: nvidia/linux-64::cuda-nvtx-11.8.86-0, conda-forge/linux-64::cudatoolkit-11.8.0-h4ba93d1_13
  path: 'lib/libnvToolsExt.so'

And similar for all these:

lib/libnvToolsExt.so.1
lib/libnvToolsExt.so.1.0.0
lib/libnvrtc-builtins.so.11.8
lib/libnvrtc-builtins.so.11.8.89
lib/libnvrtc.so.11.2
lib/libnvrtc.so.11.8.89
lib/libcurand.so.10
lib/libcurand.so.10.3.0.86
lib/libnvrtc-builtins.so
lib/libnvrtc.so
lib/libcurand.so

[jameslamb]

This work is paused, in favor of pursuing a better long-term solution in the future. Closing this PR for now.

Subscribe to rapidsai/build-planning#54 and rapidsai/build-planning#56 for updates.