Remove Linux broker validation job, Fixes AB#3492227 (#2866)

This pull request removes the `linuxBrokerValidation` job from the
`azure-pipelines/pull-request-validation/build-consumers.yml` pipeline
configuration. This job was responsible for building and testing the
Linux Broker component in the CI process.

Pipeline simplification:

* Removed the entire `linuxBrokerValidation` job, including all steps
for checking out the broker repository, setting environment variables,
retrieving secrets from Azure Key Vault, installing dependencies,
building, running tests, and publishing test results for the Linux
Broker on Ubuntu.


[AB#3492227](https://identitydivision.visualstudio.com/fac9d424-53d2-45c0-91b5-ef6ba7a6bf26/_workitems/edit/3492227)

Author: p3dr0rv

azure-pipelines/pull-request-validation/build-consumers.yml

@@ -180,81 +180,3 @@ stages:
         tasks: AADAuthenticator:localDebugAADAuthenticatorUnitTestCoverageReport --build-cache --info -Plabtest -PlabSecret=$(LabVaultAppCert) -ProbolectricSdkVersion=${{variables.robolectricSdkVersion}} -PpowerLiftApiKey=$(powerliftApiKey) -PcodeCoverageEnabled=true ${{variables.shouldSkipLongRunningTest}}
         jdkArchitecture: x64
         jdkVersionOption: "1.17"
-  # Linux broker
-  - job: linuxBrokerValidation
-    displayName: Linux Broker
-    dependsOn:
-      - setupBranch
-    variables:
-      - name: commonBranch
-        value: $[ dependencies.setupBranch.outputs['setvarStep.commonBranch'] ]  # map in the variable
-    condition: and( succeeded(), not(contains(variables['prLabels'], variables['skipConsumerValidationLabel'])) )
-    pool:
-      vmImage: 'ubuntu-22.04'
-    steps:
-      - checkout: broker
-        displayName: Checkout broker repository
-        clean: true
-        submodules: recursive
-        persistCredentials: True
-      - bash: |
-          echo "##vso[task.setvariable variable=ENV_VSTS_MVN_CRED_USERNAME]VSTS"
-          echo "##vso[task.setvariable variable=ENV_VSTS_MVN_CRED_ACCESSTOKEN]$(System.AccessToken)"
-        displayName: 'Set VSTS Fields in Environment'
-      - task: AzureKeyVault@2
-        displayName: 'Get Key vault LabAuth'
-        inputs:
-          azureSubscription: 'AuthSdkResourceManager'
-          KeyVaultName: 'MSIDLABS'
-          SecretsFilter: 'LabAuth'
-      - bash: lsb_release -d
-        displayName: ubuntu version
-      - task: PowerShell@2
-        displayName: Java Version
-        inputs:
-          targetType: inline
-          script: java -version
-      - task: CmdLine@1
-        displayName: Set Office MVN Access Token in Environment
-        inputs:
-          filename: echo
-          arguments: '##vso[task.setvariable variable=ENV_VSTS_MVN_OFFICE_ACCESSTOKEN]$(System.AccessToken)'
-      - task: Gradle@3
-        name: Gradle3
-        displayName: Assemble Linux Broker
-        inputs:
-          cwd: $(Build.SourcesDirectory)/broker-java-root
-          tasks: LinuxBroker:clean LinuxBroker:assemble --build-cache --info
-          publishJUnitResults: false
-          jdkArchitecture: x64
-          jdkVersionOption: "1.17"
-      - task: Bash@3
-        displayName: Execute tests
-        inputs:
-          workingDirectory: $(Build.SourcesDirectory)/broker-java-root
-          targetType: 'inline'
-          script: |
-            # Set Java 17
-            tree /usr/lib/jvm
-            echo "Current Java Home: $JAVA_HOME"
-            export JAVA_HOME=/usr/lib/jvm/temurin-17-jdk-amd64
-            export PATH=$JAVA_HOME/bin:$PATH
-            echo "New Java Home: $JAVA_HOME"
-            java -version  # Verify Java 17 is being used
-            
-            sudo apt-get install -y dbus-x11
-            sudo apt-get install -y dos2unix
-            dos2unix gradlew
-            chmod +x gradlew
-            export DISPLAY=:0.0
-            eval $(dbus-launch --sh-syntax)
-            sudo apt install gnome-keyring
-            /usr/bin/gnome-keyring-daemon --start --components=secrets
-            
-            ./gradlew LinuxBroker:linuxBrokerUnitTestCoverageReport -PcodeCoverageEnabled=true -PlabSecret=$(LabAuth) -Psystemd_mode_enabled=false --build-cache --info
-      - task: PublishTestResults@2
-        condition: succeededOrFailed()
-        inputs:
-          testResultsFormat: 'JUnit'
-          testResultsFiles: '**/TEST-*.xml'
-          searchFolder: 'LinuxBroker'