Disable membership requests

[dd32]

Some teams badges are automatically applied based on various activity, but it's somewhat common for people to manually request a badge through pages such as ​https://profiles.wordpress.org/associations/meta-contributor/

For the majority of teams, this is not wanted, and those requests will never be actioned, as no team-reps are admins of the badge groups (#3043 / #3026). It's also almost never the correct way to earn a badge.

In the case of the meta-contributor group above, requests for the last 8 years have simply never been approved.

The request form should just be disabled for teams whose badges are automated.

[dd32]

This has been implemented for automated groups.