x86 worker pool for foundry

Author: RazvanLiviuVarzaru

master-migration/master.cfg

@@ -481,6 +481,10 @@ FOUNDRY_WORKERS_BY_ARCH = {
         arch="aarch64", names=["bg-arm-rasmus-5"]
     ),
 }
+# No dedicated x86 workers -- 32-bit foundry builds run on the amd64 pool
+# (see _ARCH_PLATFORM in foundry/builders.py for the --platform pull that
+# gets the 32-bit image on that worker).
+FOUNDRY_WORKERS_BY_ARCH["x86"] = FOUNDRY_WORKERS_BY_ARCH["amd64"]
 
 c["builders"].append(
     foundry_builders.DISPATCHER_BUILDER.get_config(