[arm64 CI]: add arm64 github runner

Author: snadampal

.github/workflows/building.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, macos-14, windows-2019]
+        os: [ubuntu-20.04, macos-14, windows-2019, ubuntu-22.04-arm]
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         torch-version: [2.6.0]  # [2.5.0]
         cuda-version: ['cpu', 'cu118', 'cu121', 'cu124', 'cu126']

.github/workflows/testing.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest, ubuntu-22.04-arm]
         python-version: [3.9]
         torch-version: [2.5.0, 2.6.0]