permissionless `bond_extra` in nomination pools (#12608)

* create enum

* logic check

* add benchmarks

* -enum

* update

* bond extra other

* update

* update

* update

* cargo fmt

* Permissioned

* update

* cargo fmt

* update

* update index

* doc update

Co-authored-by: Ankan <10196091+Ank4n@users.noreply.github.com>

* doc update

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* cargo fmt

* bond_extra auto compound

* bond_extra_other

* Apply suggestions from code review

* Fixes from kian

* updates docs & test

* Update frame/nomination-pools/src/lib.rs

* Update frame/nomination-pools/src/lib.rs

* Update frame/nomination-pools/src/lib.rs

* Update frame/nomination-pools/src/lib.rs

* Update frame/nomination-pools/src/lib.rs

* Update frame/nomination-pools/src/tests.rs

* Update frame/nomination-pools/src/lib.rs

* Update frame/nomination-pools/src/tests.rs

* Update frame/nomination-pools/src/tests.rs

* Update frame/nomination-pools/src/tests.rs

* Update frame/nomination-pools/src/tests.rs

* Update frame/nomination-pools/src/tests.rs

* Update frame/nomination-pools/src/lib.rs

* Update frame/nomination-pools/src/tests.rs

* fixes + fmt

* expand ClaimPermissions + add benchmarks

* ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_nomination_pools

* tidy up claim payout benches

* fix

* + test: claim_payout_other_works

* comments, rename to set_claim_permission

* fix comment

* remove ClaimPermission on leave pool

* fix test

* ".git/.scripts/commands/fmt/fmt.sh"

* + test for ClaimPermissions::remove()

* impl can_bond_extra & can_claim_payout

---------

Co-authored-by: Ankan <10196091+Ank4n@users.noreply.github.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: kianenigma <kian@parity.io>
Co-authored-by: parity-processbot <>
Co-authored-by: Ross Bulat <ross@parity.io>