Patch AArch64 detection and enable Python 3.12 in Linux AArch64 nightly wheels build (#4164)

Patch nightly AArch64 Linux wheels build.

Author: puneetmatharu

.github/workflows/build_wheels_linux_aarch64.yml

@@ -30,7 +30,7 @@ jobs:
       with-cpu: enable
       with-cuda: disable
       # Note: if free-threaded python is required add py3.13t here
-      python-versions: '["3.10"]'
+      python-versions: '["3.10", "3.12"]'
 
   build:
     needs: generate-matrix

packaging/env_var_script_linux.sh

@@ -20,7 +20,8 @@ if [[ ${CU_VERSION:-} == "cu124" ]]; then
 fi
 
 # Enable C++ kernels + kleidiai in aarch64 build
-if [[ "$(uname -m)" =~ "^(aarch64|arm64)$" ]]; then
+MACHINE_HW="$(uname -m)"
+if [[ "${MACHINE_HW}" == "aarch64" || "${MACHINE_HW}" == "arm64" ]]; then
     echo "Enabling aarch64-specific build"
     export USE_CPP=1
     export USE_CPU_KERNELS=1