Remove logic which auto creates any_approver rule in approval_rule params filtering service
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https://gitlab.com/gitlab-org/gitlab/-/blob/44d105ba726956f66b1f1352a466d7ab7e6e124f/ee/app/services/approval_rules/params_filtering_service.rb#L57
The params filtering service converts the rule to an any_approver rule if no groups or users are passed
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