[bdice]

Description

#1089 made rapids_cpm_find translate DOWNLOAD_ONLY into a placeholder SOURCE_SUBDIR. CPM ties redirect suppression to DOWNLOAD_ONLY, so download-only packages started getting an empty find_package redirect stub that shadows every later find_package(<name>) in the build. This sets CPM_DONT_UPDATE_MODULE_PATH alongside the translation, which restores the pre-#1089 behavior. The setting is scoped to the rapids_cpm_find call, the same approach rapids_cpm_cccl takes (#997).

Closes #1113
xref NVIDIA/cudf#25124

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The cmake-format.json is up to date with these changes.
• I have added new files under rapids-cmake/
  • I have added include guards (include_guard(GLOBAL))
  • I have added the associated docs/ rst file and update the api.rst