don't read events in elections anymore. (#9898)

* dont read events in elections anymore.

* Update frame/election-provider-multi-phase/src/lib.rs

* Fix test for Substrate#9898 (#9907)

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>
Co-authored-by: Zeke Mostov <32168567+emostov@users.noreply.github.com>