[fuzz] Added validations for WeightedCluster and AdaptiveConcurrency (#13048)

Signed-off-by: Zach <zasweq@google.com>

Mirrored from https://github.com/envoyproxy/envoy @ 5d95032baa803f853e9120048b56c8be3dab4b0d

envoy/config/route/v3/route_components.proto

@@ -338,7 +338,9 @@ message WeightedCluster {
 
     // Specifies a list of HTTP headers that should be removed from each request when
     // this cluster is selected through the enclosing :ref:`envoy_api_msg_config.route.v3.RouteAction`.
-    repeated string request_headers_to_remove = 9;
+    repeated string request_headers_to_remove = 9 [(validate.rules).repeated = {
+      items {string {well_known_regex: HTTP_HEADER_NAME strict: false}}
+    }];
 
     // Specifies a list of headers to be added to responses when this cluster is selected
     // through the enclosing :ref:`envoy_api_msg_config.route.v3.RouteAction`.
@@ -352,7 +354,9 @@ message WeightedCluster {
 
     // Specifies a list of headers to be removed from responses when this cluster is selected
     // through the enclosing :ref:`envoy_api_msg_config.route.v3.RouteAction`.
-    repeated string response_headers_to_remove = 6;
+    repeated string response_headers_to_remove = 6 [(validate.rules).repeated = {
+      items {string {well_known_regex: HTTP_HEADER_NAME strict: false}}
+    }];
 
     // The per_filter_config field can be used to provide weighted cluster-specific
     // configurations for filters. The key should match the filter name, such as

envoy/config/route/v4alpha/route_components.proto

@@ -338,7 +338,9 @@ message WeightedCluster {
 
     // Specifies a list of HTTP headers that should be removed from each request when
     // this cluster is selected through the enclosing :ref:`envoy_api_msg_config.route.v4alpha.RouteAction`.
-    repeated string request_headers_to_remove = 9;
+    repeated string request_headers_to_remove = 9 [(validate.rules).repeated = {
+      items {string {well_known_regex: HTTP_HEADER_NAME strict: false}}
+    }];
 
     // Specifies a list of headers to be added to responses when this cluster is selected
     // through the enclosing :ref:`envoy_api_msg_config.route.v4alpha.RouteAction`.
@@ -352,7 +354,9 @@ message WeightedCluster {
 
     // Specifies a list of headers to be removed from responses when this cluster is selected
     // through the enclosing :ref:`envoy_api_msg_config.route.v4alpha.RouteAction`.
-    repeated string response_headers_to_remove = 6;
+    repeated string response_headers_to_remove = 6 [(validate.rules).repeated = {
+      items {string {well_known_regex: HTTP_HEADER_NAME strict: false}}
+    }];
 
     // The per_filter_config field can be used to provide weighted cluster-specific
     // configurations for filters. The key should match the filter name, such as

envoy/extensions/filters/http/adaptive_concurrency/v3/adaptive_concurrency.proto

@@ -51,10 +51,11 @@ message GradientControllerConfig {
         "envoy.config.filter.http.adaptive_concurrency.v2alpha.GradientControllerConfig."
         "MinimumRTTCalculationParams";
 
-    // The time interval between recalculating the minimum request round-trip time.
+    // The time interval between recalculating the minimum request round-trip time. Has to be
+    // positive.
     google.protobuf.Duration interval = 1 [(validate.rules).duration = {
       required: true
-      gt {}
+      gte {nanos: 1000000}
     }];
 
     // The number of requests to aggregate/sample during the minRTT recalculation window before