Convert a bunch of tests using global perms mocks
Created by: camdencheek
Now that we have a mockable PermsStore
interface, this converts a bunch of tests that use the global perms mocks to instead use injected mocks. This is particularly exciting because the inability to mock out the perms store (because we didn't have a way to mock enterprise stores before #29204) was blocking the conversion of a bunch of these tests.