Convert Some Treasury Configs to `NeverEnsure` Once v1.5.0 is Released

[joepetrowski]

Some of the pallet_treasury config items in the Polkadot Fellowship will require updating once NeverEnsure is available. These have been marked with links to this issue.

          we should have issues linking to todos to remind people there are future work to be done

Originally posted by @xlc in #109 (comment)