use 25.08 versions of RAPIDS CI workflows

[jameslamb]

Description

#50 removed uploads of conda packages / wheels to S3 on branch-25.08

Unfortunately, some publishing workflows on this branch are using a version of GitHub Actions workflows that expects to be able to download packages from S3, resulting in failures like this:

jq: error (at <unknown>): Cannot iterate over null (null)
Using Anaconda API: https://api.anaconda.org/
Using "rapidsai-wheels-nightly" as upload username
Error:  File "./dist/*.whl" does not exist
Error:  File "./dist/*.whl" does not exist

(build link)

This fixes that, by updating to branch-25.08 of https://github.com/rapidsai/shared-workflows.

Notes for Reviewers

Why just the publishing workflows?

All other workflows are already using branch-25.08... looks like just this small set was missed (or maybe accidentally overwritten by a bad merge conflict resolution or something).

Issue

N/A

Checklist

• I am familiar with the Contributing Guidelines.
• Testing
  • New or existing tests cover these changes
  • Added tests
  • Created an issue to follow-up
  • NA
• Documentation
  • The documentation is up to date with these changes
  • Added new documentation
  • NA

[jameslamb]

Tests are failing like this:

E   ImportError: /opt/conda/envs/test/lib/python3.12/site-packages/cudf/_lib/../../../../libcudf.so: undefined symbol: _ZN6kvikio10S3EndpointC1ESt4pairINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES7_ESt8optionalIS7_ESA_SA_SA_

(build link)

#125 is intended to fix that issue and therefore CI here.

[rgsl888prabhu]

/merge