[#528] cli/container: Use AWS-style names in basic ACL keywords

When user creates a container using neofs-cli, he can set a pre-defined ACL.
Current keywords are confusing: for example, `public` really means that
everyone can write to the container, while the expectation is just public
visibility. Perform the following renames for a better understanding of the
purpose:

 * `readonly` -> `public-read`;

 * `public` -> `public-read-write`.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-cli/modules/container.go

@@ -35,8 +35,8 @@ const (
 // keywords of predefined basic ACL values
 const (
 	basicACLPrivate  = "private"
-	basicACLReadOnly = "readonly"
-	basicACLPublic   = "public"
+	basicACLReadOnly = "public-read"
+	basicACLPublic   = "public-read-write"
 )
 
 var (