LG-9972: Implement Usability priority

[mdiarra3]

🎫 Ticket

LG-9972: Implement usability priority

👀 Screenshots

[aduth]

Looks like there might be a couple other lingering references

identity-idp/app/controllers/two_factor_authentication/otp_verification_controller.rb

Lines 150 to 153 in 5e22b24

	def sign_up_mfa_selection_order_bucket
	return unless in_multi_mfa_selection_flow?
	@sign_up_mfa_selection_order_bucket = AbTests::SIGN_UP_MFA_SELECTION.bucket(current_user.uuid)
	end

identity-idp/app/controllers/users/backup_code_setup_controller.rb

Lines 92 to 95 in 5e22b24

	def sign_up_mfa_selection_order_bucket
	return unless in_multi_mfa_selection_flow?
	AbTests::SIGN_UP_MFA_SELECTION.bucket(current_user.uuid)
	end

[aduth]

LGTM 👍