Enable ARM64 functional tests. (#344)

Author: cwize1

.github/workflows/build.yml

@@ -50,14 +50,13 @@ jobs:
       hostArch: amd64
       hostDistro: azl3
 
-  # ARM64 images aren't available in MCR yet.
-  # tests-functional-azl3-arm64:
-  #  name: Functional tests AZL3 ARM64
-  #  if: ${{ inputs.runFunctionalTests }}
-  #  uses: ./.github/workflows/tests-functional.yml
-  #  with:
-  #    hostArch: arm64
-  #    hostDistro: azl3
+  tests-functional-azl3-arm64:
+   name: Functional tests AZL3 ARM64
+   if: ${{ inputs.runFunctionalTests }}
+   uses: ./.github/workflows/tests-functional.yml
+   with:
+     hostArch: arm64
+     hostDistro: azl3
 
   tests-functional-ubuntu2404-amd64:
     name: Functional tests Ubuntu24.04 AMD64