Sweeping !22808 from 21.3 to 21.9. Adding EIL4 and EIL5 MDT chambers back into Run3 layout

Atlas Nightlybuildrequested to merge
cherry-pick-bef191727d-21.9 into 21.9

Adding EIL4 and EIL5 MDT chambers back into Run3 layout

See merge request !22808 (merged)

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