[go] Only include openssh-client (#2411)

I noticed while doing some image analysis that we're including openssh-server in the Go image. I don't see why this is needed, so following what the git image is doing and only include the client.

Signed-off-by: Billy Lynch <[email protected]>

images/go/config/template.apko.yaml

@@ -3,7 +3,7 @@ contents:
     - busybox
     - build-base
     - git
-    - openssh
+    - openssh-client
     # Go comes via var.extra_packages
 
 accounts: