Enable Rails/IndexBy and Rails/IndexWith cops
Enable Rails/IndexBy and Rails/IndexWith cops

Followup to d3599d8affa90b60b4e9ab24fdbd35477b5ac06d, which applied this
style to the existing codebase.

yawboakye/rails,EmmaB/rails-1,betesh/rails,Envek/rails,Envek/rails,yahonda/rails,yawboakye/rails,yhirano55/rails,BlakeWilliams/rails,lcreid/rails,rafaelfranca/omg-rails,eileencodes/rails,Erol/rails,yahonda/rails,yalab/rails,tgxworld/rails,yawboakye/rails,Stellenticket/rails,tjschuck/rails,Edouard-chin/rails,palkan/rails,schuetzm/rails,tgxworld/rails,schuetzm/rails,EmmaB/rails-1,esparta/rails,Erol/rails,eileencodes/rails,bogdanvlviv/rails,betesh/rails,eileencodes/rails,kmcphillips/rails,georgeclaghorn/rails,repinel/rails,kmcphillips/rails,Erol/rails,yahonda/rails,iainbeeston/rails,eileencodes/rails,starknx/rails,rails/rails,kddeisz/rails,BlakeWilliams/rails,joonyou/rails,Vasfed/rails,rails/rails,georgeclaghorn/rails,rafaelfranca/omg-rails,yalab/rails,iainbeeston/rails,repinel/rails,yhirano55/rails,Envek/rails,BlakeWilliams/rails,joonyou/rails,repinel/rails,MSP-Greg/rails,iainbeeston/rails,kmcphillips/rails,esparta/rails,schuetzm/rails,Vasfed/rails,yhirano55/rails,palkan/rails,esparta/rails,Vasfed/rails,Edouard-chin/rails,bogdanvlviv/rails,MSP-Greg/rails,starknx/rails,yhirano55/rails,kddeisz/rails,yalab/rails,bogdanvlviv/rails,BlakeWilliams/rails,tgxworld/rails,yawboakye/rails,vipulnsward/rails,Edouard-chin/rails,MSP-Greg/rails,lcreid/rails,schuetzm/rails,vipulnsward/rails,lcreid/rails,kmcphillips/rails,georgeclaghorn/rails,joonyou/rails,Erol/rails,betesh/rails,esparta/rails,Envek/rails,Stellenticket/rails,palkan/rails,starknx/rails,yalab/rails,rails/rails,tjschuck/rails,yahonda/rails,georgeclaghorn/rails,kddeisz/rails,iainbeeston/rails,EmmaB/rails-1,tjschuck/rails,palkan/rails,lcreid/rails,repinel/rails,rafaelfranca/omg-rails,MSP-Greg/rails,betesh/rails,joonyou/rails,bogdanvlviv/rails,Vasfed/rails,Edouard-chin/rails,vipulnsward/rails,vipulnsward/rails,Stellenticket/rails,tgxworld/rails,tjschuck/rails,rails/rails,Stellenticket/rails,kddeisz/rails