Port go package to universe to resolves #1553

Definition are now split in their own file.
`#Image` is a simple base image to set up a go container
`#Container` is a standalone environment to execute go command, any go command
should use this definition.
It shares `docker.#Run` fields to easily maintains this definition.
`#Build` and `#Test` are high level definition that use `#Container` to
execute common go operation in a CI.

Those definitions are tested with a simple greeting package.

Signed-off-by: Vasek - Tom C <tom.chauveau@epitech.eu>

pkg/universe.dagger.io/go/test/data/hello/greeting/greeting_test.go

@@ -0,0 +1,13 @@
+package greeting
+
+import "testing"
+
+func TestGreeting(t *testing.T) {
+	name := "Dagger Test"
+	expect := "Hi Dagger Test!"
+	value := Greeting(name)
+
+	if expect != value {
+		t.Fatalf("Hello(%s) = '%s', expected '%s'", name, value, expect)
+	}
+}