chore(deps): upgrade gapic-generator-java to 2.8.0 and update gax-java to 2.18.1 (#177)

- [ ] 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

Author: gcf-owl-bot[bot]

google-cloud-network-management/src/main/java/com/google/cloud/networkmanagement/v1/ReachabilityServiceClient.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;
@@ -139,7 +138,6 @@ public static final ReachabilityServiceClient create(ReachabilityServiceSettings
  * Constructs an instance of ReachabilityServiceClient, using the given stub for making calls.
  * This is for advanced usage - prefer using create(ReachabilityServiceSettings).
  */
- @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  public static final ReachabilityServiceClient create(ReachabilityServiceStub stub) {
  return new ReachabilityServiceClient(stub);
  }
@@ -155,7 +153,6 @@ protected ReachabilityServiceClient(ReachabilityServiceSettings settings) throws
  this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
  }
 
- @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  protected ReachabilityServiceClient(ReachabilityServiceStub stub) {
  this.settings = null;
  this.stub = stub;
@@ -166,7 +163,6 @@ public final ReachabilityServiceSettings getSettings() {
  return settings;
  }
 
- @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  public ReachabilityServiceStub getStub() {
  return stub;
  }

google-cloud-network-management/src/main/java/com/google/cloud/networkmanagement/v1/stub/ReachabilityServiceStubSettings.java

@@ -261,7 +261,6 @@ public ApiFuture<ListConnectivityTestsPagedResponse> getFuturePagedResponse(
  return deleteConnectivityTestOperationSettings;
  }
 
- @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  public ReachabilityServiceStub createStub() throws IOException {
  if (getTransportChannelProvider()
  .getTransportName()

google-cloud-network-management/src/main/java/com/google/cloud/networkmanagement/v1beta1/ReachabilityServiceClient.java

@@ -140,7 +140,6 @@ public static final ReachabilityServiceClient create(ReachabilityServiceSettings
  * Constructs an instance of ReachabilityServiceClient, using the given stub for making calls.
  * This is for advanced usage - prefer using create(ReachabilityServiceSettings).
  */
- @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  public static final ReachabilityServiceClient create(ReachabilityServiceStub stub) {
  return new ReachabilityServiceClient(stub);
  }
@@ -156,7 +155,6 @@ protected ReachabilityServiceClient(ReachabilityServiceSettings settings) throws
  this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
  }
 
- @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  protected ReachabilityServiceClient(ReachabilityServiceStub stub) {
  this.settings = null;
  this.stub = stub;
@@ -167,7 +165,6 @@ public final ReachabilityServiceSettings getSettings() {
  return settings;
  }
 
- @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  public ReachabilityServiceStub getStub() {
  return stub;
  }

google-cloud-network-management/src/main/java/com/google/cloud/networkmanagement/v1beta1/stub/ReachabilityServiceStubSettings.java

@@ -262,7 +262,6 @@ public ApiFuture<ListConnectivityTestsPagedResponse> getFuturePagedResponse(
  return deleteConnectivityTestOperationSettings;
  }
 
- @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
  public ReachabilityServiceStub createStub() throws IOException {
  if (getTransportChannelProvider()
  .getTransportName()