Reduce number of regions where the image can be shared

Unfortunately we hit the quota limit, while images are not used.

```
Build 'amazon-ebs.source' errored after 14 minutes 35 seconds: Error modify AMI attributes: ResourceLimitExceeded: You have reached your quota of 5 for the number of public images allowed in this Region. Deregister unused public images or make them private, or request an increase in your public AMIs quota.
	status code: 400, request id: 9dbc1f11-c4e4-41bc-b395-c545b84fa21b

==> Wait completed after 14 minutes 35 seconds

==> Some builds didn't complete successfully and had errors:
--> amazon-ebs.source: Error modify AMI attributes: ResourceLimitExceeded: You have reached your quota of 5 for the number of public images allowed in this Region. Deregister unused public images or make them private, or request an increase in your public AMIs quota.
	status code: 400, request id: 9dbc1f11-c4e4-41bc-b395-c545b84fa21b

```

Author: mjasion

packer/studio_ami.pkr.hcl

@@ -26,29 +26,7 @@ locals {
   }
 
   aws_release_regions = [
-    "af-south-1",
-    "ap-east-1",
-    "ap-northeast-1",
-    "ap-northeast-2",
-    "ap-northeast-3",
-    "ap-south-1",
-    "ap-south-2",
-    "ap-southeast-1",
-    "ap-southeast-2",
-    "ap-southeast-3",
-    "ap-southeast-4",
-    "ca-central-1",
-    "eu-central-1",
-    "eu-central-2",
-    "eu-north-1",
-    "eu-south-1",
-    "eu-south-2",
     "eu-west-1",
-    "eu-west-2",
-    "eu-west-3",
-    "me-central-1",
-    "me-south-1",
-    "sa-east-1",
     "us-east-1",
     "us-east-2",
     "us-west-1",
@@ -87,7 +65,8 @@ source "amazon-ebs" "source" {
 
   source_ami   = data.amazon-ami.ubuntu.id
   ssh_username = "ubuntu"
-
+  ssh_keypair_name = "mjasion-packer"
+  ssh_private_key_file = "~/.ssh/id_ed25519"
 
   force_delete_snapshot = !var.skip_create_ami
   force_deregister      = !var.skip_create_ami