chore(deps): upgrade gapic-generator-java to 2.8.0 and update gax-jav…

…a to 2.18.1 (#253)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 450543911

Source-Link: googleapis/googleapis@5528344

Source-Link: googleapis/googleapis-gen@9f6775c
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiOWY2Nzc1Y2FiMTk1ODk4MmI4ODk2N2E0M2U1ZTgwNmFmMGYxMzVkYiJ9

google-cloud-networkconnectivity/src/main/java/com/google/cloud/networkconnectivity/v1/HubServiceClient.java

@@ -18,7 +18,6 @@
 
 import com.google.api.core.ApiFuture;
 import com.google.api.core.ApiFutures;
-import com.google.api.core.BetaApi;
 import com.google.api.gax.core.BackgroundResource;
 import com.google.api.gax.longrunning.OperationFuture;
 import com.google.api.gax.paging.AbstractFixedSizeCollection;
@@ -130,7 +129,6 @@ public static final HubServiceClient create(HubServiceSettings settings) throws
    * Constructs an instance of HubServiceClient, using the given stub for making calls. This is for
    * advanced usage - prefer using create(HubServiceSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final HubServiceClient create(HubServiceStub stub) {
     return new HubServiceClient(stub);
   }
@@ -145,7 +143,6 @@ protected HubServiceClient(HubServiceSettings settings) throws IOException {
     this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected HubServiceClient(HubServiceStub stub) {
     this.settings = null;
     this.stub = stub;
@@ -156,7 +153,6 @@ public final HubServiceSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public HubServiceStub getStub() {
     return stub;
   }

google-cloud-networkconnectivity/src/main/java/com/google/cloud/networkconnectivity/v1/stub/HubServiceStubSettings.java

@@ -329,7 +329,6 @@ public UnaryCallSettings<DeleteSpokeRequest, Operation> deleteSpokeSettings() {
     return deleteSpokeOperationSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public HubServiceStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()

google-cloud-networkconnectivity/src/main/java/com/google/cloud/networkconnectivity/v1alpha1/HubServiceClient.java

@@ -131,7 +131,6 @@ public static final HubServiceClient create(HubServiceSettings settings) throws
    * Constructs an instance of HubServiceClient, using the given stub for making calls. This is for
    * advanced usage - prefer using create(HubServiceSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final HubServiceClient create(HubServiceStub stub) {
     return new HubServiceClient(stub);
   }
@@ -146,7 +145,6 @@ protected HubServiceClient(HubServiceSettings settings) throws IOException {
     this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected HubServiceClient(HubServiceStub stub) {
     this.settings = null;
     this.stub = stub;
@@ -157,7 +155,6 @@ public final HubServiceSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public HubServiceStub getStub() {
     return stub;
   }

google-cloud-networkconnectivity/src/main/java/com/google/cloud/networkconnectivity/v1alpha1/stub/HubServiceStubSettings.java

@@ -330,7 +330,6 @@ public UnaryCallSettings<DeleteSpokeRequest, Operation> deleteSpokeSettings() {
     return deleteSpokeOperationSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public HubServiceStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()