test: ok so apparently we can't use mac arm

.github/workflows/build-and-test-pr.yaml

@@ -5,7 +5,7 @@ name: CI for pull requests
 jobs:
   # https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md
   build_and_test_ubuntu:
-    name: Build and test on Ubuntu (x86_64)
+    name: Build and test on Ubuntu
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
@@ -14,27 +14,18 @@ jobs:
 
   # https://github.com/actions/runner-images/blob/main/images/windows/Windows2022-Readme.md
   build_and_test_windows:
-    name: Build and test on Windows (x86_64)
+    name: Build and test on Windows
     runs-on: windows-2022
     steps:
       - uses: actions/checkout@v4
       - id: build_and_test
         uses: ./.github/build-and-test
 
   # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md
-  build_and_test_macos_x86_64:
-    name: Build and test on macOS (x86_64)
+  build_and_test_macos:
+    name: Build and test on macOS
     runs-on: macos-13
     steps:
       - uses: actions/checkout@v4
       - id: build_and_test
         uses: ./.github/build-and-test
-
-  # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-arm64-Readme.md
-  build_and_test_macos_arm64:
-    name: Build and test on macOS (ARM64)
-    runs-on: macos-13-arm64
-    steps:
-      - uses: actions/checkout@v4
-      - id: build_and_test
-        uses: ./.github/build-and-test