prefer system install of UCX in devcontainers, update outdated RAPIDS references

[jameslamb]

Contributes to rapidsai/build-planning#118

Proposes the following changes for pip devcontainers:

• use UCX 1.17 (ref: add devcontainers cugraph-gnn#79 (comment))
• prefer system installation of ucx to the one provided by the libucx-cu{11,12} wheels (ref: prefer system installs of UCX libraries when using RAPIDS wheels devcontainers#421 (comment))

And some other related changes noticed while doing that:

• update lingering 24.* references to 25.02
• fix update-version.sh so those will be correctly updated in future releases

Similar to rapidsai/cugraph#4792

Notes for Reviewers

How I tested this

Relying on CI for most things. But for update-version.sh, tested like this:

./ci/release/update-version.sh '25.02.00'
git grep -E '24\.'

[jameslamb]

/merge