Port changes[1] back to automation repo

[1]: canonical/charm-sysconfig#92

terraform-plans/configs/charm-sysconfig_main.tfvars

@@ -18,8 +18,8 @@ templates = {
     vars = {
       # Skip ARM64 check because the functional test runs on lxd VM which is not working
       # on arm64 right now.
-      runs_on            = "[[self-hosted, jammy, X64, large]]",
-      test_commands      = "['tox -e func']",
+      runs_on            = "[[self-hosted, jammy, X64, large], [Ubuntu_ARM64_4C_16G_01]]",
+      test_commands      = "['if [ \"$(uname -m)\" = \"aarch64\" ]; then echo \"skipping func tests on arm64\"; else tox -e func; fi']",
       juju_channels      = "[\"3.4/stable\"]",
       charmcraft_channel = "3.x/stable",
       python_versions    = "['3.8', '3.10']",
@@ -36,7 +36,7 @@ templates = {
     source      = "./templates/github/charm_release.yaml.tftpl"
     destination = ".github/workflows/release.yaml"
     vars = {
-      runs_on            = "[[ubuntu-22.04], [Ubuntu_ARM64_4C_16G_01]]",
+      runs_on            = "[[ubuntu-22.04]]",
       charmcraft_channel = "3.x/stable",
     }
   }