wheels-build: do not fail fast (#517)

Proposes allowing all `wheels-build` jobs to run to completion, instead of immediately cancelling all of them when 1 fails.

This should help with narrowing down issues, like "only fails on arm64".

## Motivation

Noticed while working on rapidsai/cugraph#5479, where @ChuckHastings and I were investigating an issue that only occurred on CUDA 12 builds. Noticed that all `conda-cpp-build` jobs ran to completion, but `wheels-build` jobs were cancelled after the first failure.

<img width="1837" height="733" alt="image" src="https://github.com/user-attachments/assets/70459440-e8b0-4a16-b955-b1a22452d11e" />

## Notes for Reviewers

This change will increase CI runner usage, but I think it's worth it:

* CPU-only runners used for builds are generally cheap and plentiful
* failed wheel build jobs are valuable:
  - they provide information to speed up debugging (e.g. "only fails on arm64")
  - they partially fill up the shared build caches and package caches, which other CI jobs benefit from and which might reduce the time-to-resolution for issues

Authors:
  - James Lamb (https://github.com/jameslamb)

Approvers:
  - Kyle Edwards (https://github.com/KyleFromNVIDIA)
  - Bradley Dice (https://github.com/bdice)

URL: #517

Author: jameslamb

.github/workflows/wheels-build.yaml

@@ -174,6 +174,7 @@ jobs:
     name:  ${{ matrix.CUDA_VER }}, ${{ matrix.PY_VER }}, ${{ matrix.ARCH }}, ${{ matrix.LINUX_VER }}
     needs: [compute-matrix]
     strategy:
+      fail-fast: false
       matrix: ${{ fromJSON(needs.compute-matrix.outputs.MATRIX) }}
     runs-on: "linux-${{ matrix.ARCH }}-${{ inputs.node_type }}"
     env: