Upgrade platform to openjdk:19-slim-bullseye (#14971)

The openjdk 17 image has multiple critical vulnerabilities. This is no longer updated frequently since 17 is now in LTS and not actively developed on.

The JDK 19 images do not have any critical or high or medium vulnerabilities. Further, JVM has bytecode backwards compatibility guarantees. Here we update all of Cloud to use openjdk 19 slim to fix these holes.

Leave gradle code compilation at 17 for now.

Co-authored-by: Davin Chia <davinchia@gmail.com>

build.gradle

@@ -154,7 +154,7 @@ def Task getDockerBuildTask(String artifactName, String projectDir, String build
         def buildPlatform = System.getenv('DOCKER_BUILD_PLATFORM') ?: isArm64 ? 'linux/arm64' : 'linux/amd64'
         def alpineImage = System.getenv('ALPINE_IMAGE') ?: isArm64 ? 'arm64v8/alpine:3.14' : 'amd64/alpine:3.14'
         def nginxImage = System.getenv('NGINX_IMAGE') ?: isArm64 ? 'arm64v8/nginx:1.19-alpine' : 'amd64/nginx:1.19-alpine'
-        def openjdkImage = System.getenv('JDK_IMAGE') ?: isArm64 ? "arm64v8/openjdk:${jdkVersion}-slim" : "amd64/openjdk:${jdkVersion}-slim"
+        def openjdkImage = System.getenv('JDK_IMAGE') ?: isArm64 ? "arm64v8/openjdk:19-slim-bullseye" : "amd64/openjdk:19-slim-bullseye"
         def buildArch = System.getenv('DOCKER_BUILD_ARCH') ?: isArm64 ? 'arm64' : 'amd64'
 
         inputDir = file("$projectDir/build/docker")