Data graph permissions decoding -- removing redundancies (#27665)

This work removes a spec and a p.schema for data graph permissions.

There are still some specs but they are for execution, and collection graph permissions. Those should be targeted next.

* decoded + verified FIXME

* still good

* some cleanup

* a little more cleaning up

* bit more cleaning

* converted update-group-permissions! -> mu/defn

* use the correct shape for new-group-perms

* remove bunch of pschemas

* linter appeasement

* update test for setting dissallowed schema

* respond to review comments

* fix some tests + improve mu/defn error messages

* a lint fix

* lint fix

* read and query are optional

* update expected error message to the improved one

* stop calling trs at the top level

* fix function signature

* improve test