Update rmm tests to use rapids_cmake_support_conda_env

[robertmaynard]

Description

Fixes issue brought up in rapidsai/rapids-cmake#634 (comment) where rmm wasn't using rapids_cmake_support_conda_env

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[vyasr]

How do we handle installation of tests (e.g. to build the librmm-tests conda packages)? I'm actually a bit confused now because I don't see that package being uploaded anywhere, but I'm asking because I know that for cudf we needed to set up install rules for the conda_env target to make install rules for cudf work transitively, and I'm wondering if we need something similar for tests. It seems like we don't in cudf either, though, so I'm approving under the assumption that I'm missing something about how we handle test installation right now.

[bdice]

How do we handle installation of tests (e.g. to build the librmm-tests conda packages)? I'm actually a bit confused now because I don't see that package being uploaded anywhere

All of the RAPIDS *-test packages are solely used as CI artifacts. We do not publish the *-tests packages to rapidsai-nightly or rapidsai, only the intermediate storage buckets in downloads.rapids.ai used for PR and nightly builds/tests.

[vyasr]

Where is that logic? I see that we're skipping libcudf-examples in cudf, for example, but not tests, and no equivalent key is specified for rmm.

[bdice]

@vyasr That's actually a great question. I had to dig for the answer. Here it is: https://github.com/rapidsai/gha-tools/blob/88a3c66684b02e727fc64246437f2800d9d4ad1e/tools/rapids-find-anaconda-uploads.py#L32-L37

[vyasr]

Wow that is very hidden... nice find though, thanks!

[robertmaynard]

/merge