Add ensure type configurations for various AdminOrigin's

[mattsse]

Issue summary

• Currently all AdminOrigins are configured in the runtime as EnsureRoot, they should be configured with their own types (e.g. EnsureCouncil)

Other information and links

[clearloop]

Use frame_system::EnsureOneOf, EnsureRootOrHalfCouncil

See also:

• pallet::collective::EnsureProportionMoreThan
• pallet::membership::Config::AddOrigin

[mattsse]

I think what will also be required is something like EnsureMember that checks whether the origin is included in the memebers list of the comittee. And EnsureApprovedByCommittee that checks for the CommitteeOrigin

[clearloop]

I think what will also be required is something like EnsureMember that checks whether the origin is included in the memebers list of the comittee.

I'm confused about why we separate ProposalSubmissionOrigin and ProposalExecutionOrigin but not just a CouncilOrigin or (CouncilOrigin and ConstituentOrigin)