chore: Integrate new gapic-generator-java and rules_gapic (#258)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 454027580

Source-Link: googleapis/googleapis@1b22277

Source-Link: https://github.com/googleapis/googleapis-gen/commit/e04cea20d0d12eb5c3bdb360a9e72b654edcb638
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiZTA0Y2VhMjBkMGQxMmViNWMzYmRiMzYwYTllNzJiNjU0ZWRjYjYzOCJ9

java-api-gateway/google-cloud-api-gateway/src/main/java/com/google/cloud/apigateway/v1/ApiGatewayServiceClient.java

@@ -307,7 +307,7 @@ public final ListGatewaysPagedResponse listGateways(ListGatewaysRequest request)
    *   while (true) {
    *     ListGatewaysResponse response =
    *         apiGatewayServiceClient.listGatewaysCallable().call(request);
-   *     for (Gateway element : response.getResponsesList()) {
+   *     for (Gateway element : response.getGatewaysList()) {
    *       // doThingsWith(element);
    *     }
    *     String nextPageToken = response.getNextPageToken();
@@ -947,7 +947,7 @@ public final UnaryCallable<ListApisRequest, ListApisPagedResponse> listApisPaged
    *           .build();
    *   while (true) {
    *     ListApisResponse response = apiGatewayServiceClient.listApisCallable().call(request);
-   *     for (Api element : response.getResponsesList()) {
+   *     for (Api element : response.getApisList()) {
    *       // doThingsWith(element);
    *     }
    *     String nextPageToken = response.getNextPageToken();
@@ -1572,7 +1572,7 @@ public final ListApiConfigsPagedResponse listApiConfigs(ListApiConfigsRequest re
    *   while (true) {
    *     ListApiConfigsResponse response =
    *         apiGatewayServiceClient.listApiConfigsCallable().call(request);
-   *     for (ApiConfig element : response.getResponsesList()) {
+   *     for (ApiConfig element : response.getApiConfigsList()) {
    *       // doThingsWith(element);
    *     }
    *     String nextPageToken = response.getNextPageToken();