Deprecate and archive puppet-mcollective

[smortex]

• This module does not support Puppet 6+ (Compilation fails with Puppet 6 & 7: Illegal title type at index 0 #395);
• Puppet 7+ does not ship with MCollective anymore;
• Choria has supeseded MCollective and is fully supported on Puppet 7 with the modules form the choria organization.

For these reasons, this module does not make sense in a modern Puppet ecosystem, therefore I propose to deprecate and archive it.

[tuxmea]

+1 @bastelfreak

[TheMeier]

reminder: please archive :D

[ekohl]

Copying the steps from https://voxpupuli.org/docs/deprecated_and_archived_modules/ and it looks like most steps have already been taken.

• An issue needs to be raised on the module to discuss whether it should be archived or not. An additional post to the mailing list for better visibility is recommended. The decision will be made by lazy consensus (as described in our governance guidelines)
• The README.md needs a bold message at the beginning
  • It must mention that the module is archived
  • If a successor exists, that one should be linked to
  • The deprecation issue in that project must be linked
• The GitHub repository needs to be archived in the GitHub settings
• On forge.puppet.com the module needs to be archived, with a link to the successor (if available)
• The module needs to be removed from our modulesync_config.
• The Vox Pupuli admins can manage the org secrets. The permission for the archived module needs to be revoked.