teach ring manager about more eqiad racks
The racks in eqiad rows E and F have a different subnet per rack, which swift_ring_manager needs to know about so it knows which zones to put backends in those racks into.
Bug: T353149
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The racks in eqiad rows E and F have a different subnet per rack, which swift_ring_manager needs to know about so it knows which zones to put backends in those racks into.
Bug: T353149