test: test github architecture runners

Author: soonum

ci/slab.toml

@@ -8,8 +8,11 @@ subnet_id = "subnet-0e042c7621461f754"
 # Handling backends
 [backend.aws.cpu]
 region = "eu-west-3"
-image_id = "ami-05e8e219ac7e82eba" # ubuntu 22.04
-instance_type = "t3.xlarge"
+#image_id = "ami-05e8e219ac7e82eba" # ubuntu 22.04
+image_id = "ami-00232bbfe70330a10" # ubuntu 22.04 ARM64
+#instance_type = "t3.xlarge"
+instance_type = "t4g.medium" # ARM machine
+gh_runner_arch = "arm64"
 #instance_type = "t345.xlarge" # Non existing instance type
 
 [backend.aws.cpu_fallback]