MFH: r391274

www/zope213: make this port usable when installed from packages

Both ports users and package users now follow uniform procedure of creating
application instance.

Summary:

• Clean up port and remove make instance functionality that duplicates native Zope tool functionality
• Standardize and ensure pkg-message instructions correctly set up Zope
• Make Portlint and Poudriere testport clean
• Set NO_ARCH

PR: 200040
Submitted by: Jason Unovitch <jason.unovitch@gmail.com>
Approved by: ports-secteam (feld)