Fix "empty" approval rules when user_ids or group_ids provided

What does this MR do and why?

Contributes to #415431 (closed)

Problem

Grape v1.7.0 introduced a change to parameter renaming functionality. https://github.com/ruby-grape/grape/blob/master/UPGRADING.md#upgrading-to--160

Grape update issue: #395809 (closed)

With out previous configuration it was possible to send user_ids and group_ids as parameters. But after the gem upgrade this configuration became invalid and prevents us from accessing user_ids and group_ids.

Solution

Explicitly add a parameter definition for user_ids and group_ids. It will permit us to set user_ids and group_ids in the query.

How to set up and validate locally

1. See steps to reproduce: #415431 (closed)

MR acceptance checklist

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