Create Group Usage Quotas menu entry in Core

This is a break down of #371820 (closed)

We need to create a menu entry for Usage Quotas Page in all GitLab Editions.

All changes are behind usage_quotas_for_all_editions Feature Flag.

EE and SaaS

Usage Quotas menu in both

FF off FF on
usage_quotas_menu_ee_ff_off usage_quotas_menu_ee_ff_on

EE unlicensed

FF off FF on
usage_quotas_menu_eeu_ff_off.png usage_quotas_menu_eeu_ff_on

CE

export FOSS_ONLY=1 && gdk restart
FF off FF on
usage_quotas_menu_ce_ff_off usage_quotas_menu_ce_ff_on

MR implementing this

Edited by Sheldon Led