Use PermissionEnum as input parameter in staff mutations

[maarcingebala]

StaffCreateInput and StaffInput were using String as the input parameter while the PermissionEnum is the right one. Fixes crashing create/update views in Dashboard 2.0.

I've generated new types for TS and some unrelated types were changed, but I assume that we forgot to generate the new types with one of the previous PR so I kept that.

Pull Request Checklist

1. Privileged views and APIs are guarded by proper permission checks.
2. All visible strings are translated with proper context.
3. All data-formatting is locale-aware (dates, numbers, and so on).
4. Database queries are optimized and the number of queries is constant.
5. Database migration files are up to date.
6. The changes are tested.
7. The code is documented (docstrings, project documentation).
8. GraphQL schema and type definitions are up to date.
9. Changes are mentioned in the changelog.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@b799170). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master    #3434   +/-   ##
=========================================
  Coverage          ?   89.67%           
=========================================
  Files             ?      237           
  Lines             ?    12793           
  Branches          ?     1285           
=========================================
  Hits              ?    11472           
  Misses            ?      920           
  Partials          ?      401

Impacted Files	Coverage Δ
saleor/graphql/account/mutations.py	95.18% <100%> (ø)

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