Build ARM Linux and macOS wheels natively on Cirrus CI

Add .cirrus.yml workflow that runs natively on ARM macOS/Linux.
For Linux, this is faster than building via emulation. For macOS,
this is more correct, as cross-compiling was producing unusable
wheels! It turns out we are building libhts.a incorrectly when
cross-compiling: see #1231.

Remove ARM builds from the x86_64 release.yaml GH Actions workflow.
Also remove i686 builds: it's unclear whether these were being built
correctly either, and probably very few people use them.

Update to the very recently released current cibuildwheel, which
updates to the also very recently released Python 3.12.0 (final).

.cirrus.yml

@@ -0,0 +1,73 @@
+build_wheels_task:
+  only_if: $CIRRUS_BRANCH =~ "release/.*" || $CIRRUS_TAG =~ "v0\..*"
+
+  matrix:
+    - compute_engine_instance:
+        image_project: cirrus-images
+        image: family/docker-builder-arm64
+        architecture: arm64
+        platform: linux
+      matrix:
+        - name: Build ARM Linux py3.6-9 wheels
+          env:
+            CIBW_BUILD: "cp36-* cp37-* cp38-* cp39-*"
+        - name: Build ARM Linux py3.10-12 wheels
+          env:
+            CIBW_BUILD: "cp310-* cp311-* cp312-*"
+
+    - name: Build ARM macOS wheels
+      macos_instance:
+        image: ghcr.io/cirruslabs/macos-ventura-base:latest
+      env:
+        CIBW_BUILD: "cp39-* cp310-* cp311-* cp312-*"
+
+  alias: build_wheels
+
+  env:
+    CIRRUS_CLONE_DEPTH: 1
+
+    CIBW_SKIP: "*-musllinux_*"
+    CIBW_MANYLINUX_AARCH64_IMAGE: manylinux_2_28
+
+  install_script: |
+    python3 -m pip install cibuildwheel==2.16.2
+
+  build_script: |
+    cibuildwheel
+
+  wheels_artifacts:
+    path: wheelhouse/*.whl
+
+upload_pypi_task:
+  only_if: $CIRRUS_BRANCH =~ "release/.*" || $CIRRUS_TAG =~ "v0\..*"
+  depends_on: build_wheels
+
+  name: Publish ARM wheels
+
+  container:
+    image: python:latest
+
+  env:
+    CIRRUS_CLONE_DEPTH: 1
+    API_BASEURL: https://api.cirrus-ci.com/v1
+    TWINE_USERNAME: __token__
+
+  install_script: |
+    python3 -m pip install twine
+
+  get_artifacts_script: |
+    curl -sSLO $API_BASEURL/artifact/build/$CIRRUS_BUILD_ID/wheels.zip
+    unzip -q wheels.zip
+
+  upload_script: |
+    case "$CIRRUS_TAG" in
+    v0.*)
+        export TWINE_REPOSITORY=pypi TWINE_PASSWORD=$PYPI_TOKEN ;;
+    *)
+        export TWINE_REPOSITORY=testpypi TWINE_PASSWORD=$TESTPYPI_TOKEN ;;
+    esac
+
+    echo Uploading wheels to $TWINE_REPOSITORY...
+
+    python3 -m twine check wheelhouse/*.whl
+    python3 -m twine upload --disable-progress-bar wheelhouse/*.whl

.github/workflows/release.yaml

@@ -15,14 +15,11 @@ jobs:
     runs-on: ${{ matrix.os }}-latest
     strategy:
       matrix:
-        os: [ubuntu]
-        build: ["cp36-* cp37-*", "cp38-* cp39-*", "cp310-* cp311-*", "cp312-*"]
+        os: [ubuntu, macos]
+        build: ["cp36-* cp37-* cp38-* cp39-*", "cp310-* cp311-* cp312-*"]
         x64image: [manylinux_2_28]
 
         include:
-          - os: macos
-            build: "cp36-* cp37-* cp38-* cp39-* cp310-* cp311-* cp312-*"
-
           - os: ubuntu
             build: "cp38-manylinux_x86_64"
             x64image: manylinux2014
@@ -31,31 +28,23 @@ jobs:
       - name: Checkout pysam
         uses: actions/checkout@v3
 
-      - name: Set up QEMU
-        if:   runner.os == 'Linux'
-        uses: docker/setup-qemu-action@v2
-        with:
-          platforms: arm64
-
       - name: Build wheels
-        uses: pypa/[email protected].1
+        uses: pypa/[email protected].2
         env:
           CIBW_BUILD: ${{ matrix.build }}
           CIBW_SKIP: "*musllinux*"
 
-          CIBW_ARCHS_LINUX: auto aarch64
-          CIBW_ARCHS_MACOS: x86_64 arm64
+          CIBW_ARCHS_LINUX: x86_64
+          CIBW_ARCHS_MACOS: x86_64
 
           CIBW_MANYLINUX_X86_64_IMAGE:  ${{ matrix.x64image }}
           CIBW_MANYLINUX_I686_IMAGE:    manylinux2014
           CIBW_MANYLINUX_AARCH64_IMAGE: manylinux_2_28
 
-          CIBW_TEST_SKIP: "*-*linux_i686 *-*linux_aarch64 *-macosx_arm64"
-
       - name: Upload artifacts
         uses: actions/upload-artifact@v3
         with:
-          path: ./wheelhouse/*.whl
+          path: wheelhouse/*.whl
 
   build_sdist:
     runs-on: ${{ matrix.os }}-latest