Please Add more Vm sizes only d_1 or Ds_1 is created if we choose t-shrit size Xs the lowest with 2 dbs and one arbiter and some regions doesnt have that size ,but it has others like ds_1V2 so i would be nice if you do a little more loosely coupled way to assign the sizes

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[Template Name goes here](Template link goes here)

### Issue Details

### Repro steps (*if necessary, delete otherwise*)
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The issue names no template, file, or reproduction steps. Start by locating the template responsible for VM-size selection and inspect how shirt sizes are mapped to region-available sizes. Done means the requested size can select an available compatible VM size in regions where the current choice is unavailable, with the affected template behavior verified.

Written by the indexing model from the issue text.