fix: IdP listener rule for well-known config (#763)

Update the IdP load balancer listener rule to also send requests to
the /.well-known/openid-configuration endpoint to the HTTP1 target group.

aws/idp/lb.tf

@@ -112,7 +112,7 @@ resource "aws_alb_listener_rule" "idp_protocol_version" {
 
   condition {
     path_pattern {
-      values = ["/*/v?/*"] # REST API endpoint pattern `/type/v1/some/endpoint/go/now`
+      values = ["/*/v?/*", "/.well-known/openid-configuration"] # REST API endpoints
     }
   }
 }