chore: use incoming gapic-generator-java version 2.69.0

Author: diegomarquezp

.cloudbuild/library_generation/library_generation.Dockerfile

@@ -21,7 +21,7 @@ FROM docker.io/library/maven:3.9.9-eclipse-temurin-17-alpine@sha256:969014ee8852
 WORKDIR /sdk-platform-java
 COPY . .
 # {x-version-update-start:gapic-generator-java:current}
-ENV DOCKER_GAPIC_GENERATOR_VERSION="2.68.1-SNAPSHOT"
+ENV DOCKER_GAPIC_GENERATOR_VERSION="2.69.0"
 # {x-version-update-end}
 
 # Download the java formatter

.cloudbuild/library_generation/library_generation_airlock.Dockerfile

@@ -21,7 +21,7 @@ FROM us-docker.pkg.dev/artifact-foundry-prod/docker-3p-trusted/maven@sha256:d3f0
 WORKDIR /sdk-platform-java
 COPY . .
 # {x-version-update-start:gapic-generator-java:current}
-ENV DOCKER_GAPIC_GENERATOR_VERSION="2.68.1-SNAPSHOT"
+ENV DOCKER_GAPIC_GENERATOR_VERSION="2.69.0"
 # {x-version-update-end}
 
 # Download the java formatter