build(dev): build separate wheels for Mac OS architectures

The `macos-13` (GitHub-hosted) runner will be unavailable by Dec 4 2025.
See the [GitHub notice].

Apparently, Apple has deprecated support for Intel-based x86_64 architecture.
This means building a universal wheel will no longer be useful.

This patch builds a separate wheel for x86_64 and arm64 architectures.
Doing this also allows `cibuildwheel` to properly test each architecture individually.
Whereas before, there were warnings about tests not getting run for arm64 on a x86_64 runner.

> [!WARNING]
> Beware, the github-hosted `macos-15-intel` runner is provided to sunset x86_64 MacOS runners.
> The `macos-15-intel` runner will become unavailable in August 2027.
> Afterward, the CI will only be able to compile arm64 wheels for MacOS.

[GitHub notice]: actions/runner-images#13046

Author: 2bndy5

.github/workflows/wheels.yml

@@ -25,8 +25,10 @@ jobs:
           os: ubuntu-24.04
         - name: linux-arm
           os: ubuntu-24.04-arm
-        - name: macos
-          os: macos-13
+        - name: macos-intel
+          os: macos-15-intel
+        - name: macos-arm
+          os: macos-15
         - name: windows-x64
           os: windows-latest
         - name: windows-x86

pyproject.toml

@@ -25,7 +25,6 @@ select = "*-musllinux*"
 repair-wheel-command = "LD_LIBRARY_PATH=/project/ci/lib auditwheel repair -w {dest_dir} {wheel}"
 
 [tool.cibuildwheel.macos]
-archs = ["universal2"]
 environment = {LIBGIT2_VERSION="1.9.1", LIBSSH2_VERSION="1.11.1", OPENSSL_VERSION="3.3.3", LIBGIT2="/Users/runner/work/pygit2/pygit2/ci"}
 repair-wheel-command = "DYLD_LIBRARY_PATH=/Users/runner/work/pygit2/pygit2/ci/lib delocate-wheel --require-archs {delocate_archs} -w {dest_dir} {wheel}"