[BUG] Installing UCX via CPM is broken

[dagardner-nv]

Describe the bug
Typically UCX is installed in the conda env, this bug is only hit when it isn't already in the env, so this is rare.

There are two bugs that prevent UCX from being installed via CPM:

1. The version set is v1.13 however no tag of that name exists, v1.13.0 and v1.13.1 do exist.
2. If the version is set correctly we get an error about the ucx::ucx target:

CMake Error at build/srf-dependencies.cmake:472 (set_target_properties):
  Attempt to promote imported target "ucx::ucx" to global scope (by setting
  IMPORTED_GLOBAL) which is not built in this directory.
Call Stack (most recent call first):
  build/srf-config.cmake:69 (include)
  build/_deps/rapids-cmake-src/rapids-cmake/find/package.cmake:114 (find_package)
  docs/quickstart/CMakeLists.txt:39 (rapids_find_package)

Steps/Code to reproduce bug

mamba uninstall ucx

[dagardner-nv]

I took a quick pass at this, unfortunately libucs ends up with undefined symbols from ucm in it. Not sure how/why.

https://github.com/dagardner-nv/SRF/tree/david-ucx-ver