[#50186709] Mismatching asset dir permissions
[#50186709] Mismatching asset dir permissions

backend-* and asset-master/asset-slave were fighting over the permissions of
this directory and causing it to constantly refresh:

(/Stage[main]/Assets/File[/data/uploads]/mode) mode changed '0755' to '0775'
(/Stage[main]/Govuk::Node::S_asset_base/File[/mnt/uploads]/mode) mode changed '0775' to '0755'
(/Stage[main]/Govuk::Node::S_asset_slave/File[/data/master-uploads]/mode) mode changed '0775' to '0755'

Standardise them all to '0755' to stop the resource from flapping with
immediate effect. I'll then investigate only managing these permissions on
the exporting nodes, rather than the clients.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet