ci: standardize wheel build job names as "<OS> <arch> (<tag>)"

The mac/Windows matrix shared a single name template that prepended
"macOS arm64 & Windows" to every entry, which got truncated in the
GitHub UI sidebar and made it hard to tell macOS and Windows runs
apart. Rename all wheel build jobs to the same pattern so the OS,
architecture, and python tag are visible at a glance:

- Linux x86_64 / arm64
- macOS arm64 / x86_64
- Windows x86_64

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: timsaucer

.github/workflows/build.yml

@@ -135,7 +135,7 @@ jobs:
   # ============================================
   build-manylinux-x86_64:
     needs: [generate-license, lint-rust, lint-python]
-    name: ManyLinux x86_64 (${{ matrix.python-tag }})
+    name: Linux x86_64 (${{ matrix.python-tag }})
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -214,7 +214,7 @@ jobs:
   # ============================================
   build-manylinux-aarch64:
     needs: [generate-license, lint-rust, lint-python]
-    name: ManyLinux arm64 (${{ matrix.python-tag }})
+    name: Linux arm64 (${{ matrix.python-tag }})
     runs-on: ubuntu-24.04-arm
     strategy:
       fail-fast: false
@@ -276,7 +276,7 @@ jobs:
   # ============================================
   build-python-mac-win:
     needs: [generate-license, lint-rust, lint-python]
-    name: macOS arm64 & Windows (${{ matrix.python-tag }} / ${{ matrix.os }})
+    name: ${{ matrix.os == 'macos-latest' && 'macOS arm64' || 'Windows x86_64' }} (${{ matrix.python-tag }})
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false