Add canada-east and southeast-asia to gecko-t location_map#293
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Adds the two new regions selected for gecko-t/win11-64-25h2 in mozilla-releng/fxci-config#946. Each entry triggers the workerPool_v1 module to provision an rg/vnet/subnet/nsg/storage account in the region. uk-south is already in the map, so no change there.
This was referenced Apr 28, 2026
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Provisions the per-region infrastructure (resource group, vnet/subnet, NSG, storage account) for two new Azure regions added to `gecko-t/win11-64-25h2` in mozilla-releng/fxci-config#946:
`uk-south` is the third region in fxci-config#946 but is already in the gecko-t `location_map`, so no change there.
Selection rationale
Both regions sit in Azure's 0-5% bucket of the 28-day `Standard_F8s_v2` Spot eviction history (`AzureResourceGraph.SpotResources`) and are below the current pool's median Spot Windows price. uk-south is the cheapest 0-5% region in the candidate set ($0.1081/hr, 26% under median). canada-east and southeast-asia are the geographically-paired Americas and APAC picks. See fxci-config#946 for the full cost+eviction analysis.
What this provisions
Each entry in `location_map` triggers the `workerPool_v1` module to create:
Plan
@jmoss will run `terraform apply` locally after merge.
Out of scope
This PR only touches the `gecko-t` `location_map`. Other pools (`comm-t`, `comm-1`, `gecko-1`, `gecko-2`, `enterprise-t`, `enterprise-1`, `nss-t`, `nss-1`, `mozilla-1`, `taskgraph-t`) also have `location_map` blocks but are not modified here. The companion change in mozilla-platform-ops/worker-images replicates Windows images globally to canadaeast/southeastasia, so any of those pools that later want to launch in those regions can be added in a follow-up.