upstream: respect overprovisioning factor for static/strict dns (#5091)

Plumbs through the value set for the overprovisioning factor for
STATIC/STRICT_DNS. Previously these values would be ignored.

Signed-off-by: Snow Pettersen <snowp@squareup.com>

Mirrored from https://github.com/envoyproxy/envoy @ 25b143c9813671c320561f8b0b8b31d7e0a3dac4

envoy/api/v2/eds.proto

@@ -89,7 +89,12 @@ message ClusterLoadAssignment {
     // multiplied by the overprovisioning factor drops below 100.
     // With the default value 140(1.4), Envoy doesn't consider a priority level
     // or a locality unhealthy until their percentage of healthy hosts drops
-    // below 72%.
+    // below 72%. For example:
+    //
+    // .. code-block:: json
+    //
+    //  { "overprovisioning_factor": 100 }
+    //
     // Read more at :ref:`priority levels <arch_overview_load_balancing_priority_levels>` and
     // :ref:`localities <arch_overview_load_balancing_locality_weighted_lb>`.
     google.protobuf.UInt32Value overprovisioning_factor = 3 [(validate.rules).uint32.gt = 0];