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

…a to 2.18.1 (#168)

- [ ] Regenerate this pull request now.

PiperOrigin-RevId: 450543911

Source-Link: googleapis/googleapis@5528344

Source-Link: https://github.com/googleapis/googleapis-gen/commit/9f6775cab1958982b88967a43e5e806af0f135db
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiOWY2Nzc1Y2FiMTk1ODk4MmI4ODk2N2E0M2U1ZTgwNmFmMGYxMzVkYiJ9

java-datastream/google-cloud-datastream/src/main/java/com/google/cloud/datastream/v1/DatastreamClient.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;
@@ -133,7 +132,6 @@ public static final DatastreamClient create(DatastreamSettings settings) throws
    * Constructs an instance of DatastreamClient, using the given stub for making calls. This is for
    * advanced usage - prefer using create(DatastreamSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final DatastreamClient create(DatastreamStub stub) {
     return new DatastreamClient(stub);
   }
@@ -148,7 +146,6 @@ protected DatastreamClient(DatastreamSettings 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 DatastreamClient(DatastreamStub stub) {
     this.settings = null;
     this.stub = stub;
@@ -159,7 +156,6 @@ public final DatastreamSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public DatastreamStub getStub() {
     return stub;
   }

java-datastream/google-cloud-datastream/src/main/java/com/google/cloud/datastream/v1/stub/DatastreamStubSettings.java

@@ -857,7 +857,6 @@ public UnaryCallSettings<GetLocationRequest, Location> getLocationSettings() {
     return getLocationSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public DatastreamStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()

java-datastream/google-cloud-datastream/src/main/java/com/google/cloud/datastream/v1alpha1/DatastreamClient.java

@@ -130,7 +130,6 @@ public static final DatastreamClient create(DatastreamSettings settings) throws
    * Constructs an instance of DatastreamClient, using the given stub for making calls. This is for
    * advanced usage - prefer using create(DatastreamSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final DatastreamClient create(DatastreamStub stub) {
     return new DatastreamClient(stub);
   }
@@ -145,7 +144,6 @@ protected DatastreamClient(DatastreamSettings 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 DatastreamClient(DatastreamStub stub) {
     this.settings = null;
     this.stub = stub;
@@ -156,7 +154,6 @@ public final DatastreamSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public DatastreamStub getStub() {
     return stub;
   }

java-datastream/google-cloud-datastream/src/main/java/com/google/cloud/datastream/v1alpha1/stub/DatastreamStubSettings.java

@@ -691,7 +691,6 @@ public UnaryCallSettings<DeleteRouteRequest, Operation> deleteRouteSettings() {
     return deleteRouteOperationSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public DatastreamStub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()