Migrate some more pallets to construct_runtime (#7975)

* WIP converting balances tests to construct_runtime

* Converting balances tests_local to construct_runtime

* Fix up system and balances Events

* Use static Call instance in tests

* Migrate indices to construct_runtime

* Migrate babe test to construct_runtime

* Update frame/indices/src/mock.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* Update frame/babe/src/mock.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* Update frame/babe/src/mock.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Remove redundant import

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>