[ruff]: Build loongarch64 binaries in CI (#20361)

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## Summary

<!-- What's the purpose of the change? What does it do, and why? -->

This PR adds support for building loongarch64 binaries in CI. As such
support has been merged in uv (astral-sh/uv#15387) it's time to consider
adding it to ruff.

Please note that as Ubuntu is not yet available for loongarch64, I have
elected to use a Debian Trixie container maintained by community
members. In addition, as Debian's pip does not allow installing modules
system-wide, I have modified the workflow to install additional modules
in a virtual environment.

Since the workflow is shared between all targets, the only way to handle
this difference (between Debian and Ubuntu) is just to install pip in a
venv for all targets. If there is a better (and less intrusive) way to
work around this, please let me know.

## Test Plan

Tests are included in CI and the loongarch64 artifacts built in [this
workflow](https://github.com/SkyBird233/ruff/actions/runs/17640270032/job/50125471548)
has been smoke tested.

.github/workflows/build-binaries.yml

@@ -294,6 +294,11 @@ jobs:
             arch: arm
           - target: riscv64gc-unknown-linux-gnu
             arch: riscv64
+          - target: loongarch64-unknown-linux-gnu
+            arch: loong64
+            # There's currently no loong64 support for Ubuntu so we are using Debian
+            base_image: --platform=linux/loong64 ghcr.io/loong64/debian:trixie
+            maturin_docker_options: -e JEMALLOC_SYS_WITH_LG_PAGE=16
 
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -318,12 +323,15 @@ jobs:
         with:
           arch: ${{ matrix.platform.arch == 'arm' && 'armv6' || matrix.platform.arch }}
           distro: ${{ matrix.platform.arch == 'arm' && 'bullseye' || 'ubuntu20.04' }}
+          base_image: ${{ matrix.platform.base_image }}
           githubToken: ${{ github.token }}
           install: |
             apt-get update
-            apt-get install -y --no-install-recommends python3 python3-pip libatomic1
-            pip3 install -U pip
+            apt-get install -y --no-install-recommends python3 python3-pip python3-venv libatomic1
           run: |
+            python3 -m venv .venv
+            source .venv/bin/activate
+            pip3 install -U pip
             pip3 install ${{ env.PACKAGE_NAME }} --no-index --find-links dist/ --force-reinstall
             ruff --help
       - name: "Upload wheels"

.github/workflows/publish-pypi.yml

@@ -28,5 +28,7 @@ jobs:
           pattern: wheels-*
           path: wheels
           merge-multiple: true
+      - name: Remove wheels unsupported by PyPI
+        run: rm wheels/*loong*
       - name: Publish to PyPi
         run: uv publish -v wheels/*