Companion PR: add weightinfo for collective (#1524)

* add and use generated weights for collective pallet

* correct pallet name

* MaxMembers

* add weight to technical collective

* Fix const assert

* update weights

* update import

* "Update Substrate"

* bump spec_version

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>
Co-authored-by: parity-processbot <>
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