feat: Convert_to_gl_ci flow with Flow Registry

❗ Must be merged AFTER gitlab-org/modelops/applied-ml/code-suggestions/ai-assist!4131 (merged) is merged and tested ❗

What does this MR do and why?

This MR adds a new FF to toggle between the current convert_to_gl_ci workflow and the new Flow Registry convert_to_gl_ci flow.

References

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Checkout ah/convert-to-gitlab-ci-flow-registry

2. Navigate to a Jenkinsfile in GDK

   # Jenkinsfile
   
   node {
     // Mark the code checkout 'stage'....
     stage 'Stage Checkout'
   
     // Checkout code from repository and update any submodules
     checkout scm
     sh 'git submodule update --init'  
   
     stage 'Stage Build'
   
     //branch name from Jenkins environment variables
     echo "My branch is: ${env.BRANCH_NAME}"
   
     def flavor = flavor(env.BRANCH_NAME)
     echo "Building flavor ${flavor}"
   
     //build your gradle flavor, passes the current build number as a parameter to gradle
     sh "./gradlew clean assemble${flavor}Debug -PBUILD_NUMBER=${env.BUILD_NUMBER}"
   
     stage 'Stage Archive'
     //tell Jenkins to archive the apks
     archiveArtifacts artifacts: 'app/build/outputs/apk/*.apk', fingerprint: true
   
     stage 'Stage Upload To Fabric'
     sh "./gradlew crashlyticsUploadDistribution${flavor}Debug  -PBUILD_NUMBER=${env.BUILD_NUMBER}"
   }
   
   // Pulls the android flavor out of the branch name the branch is prepended with /QA_
   @NonCPS
   def flavor(branchName) {
     def matcher = (env.BRANCH_NAME =~ /QA_([a-z_]+)/)
     assert matcher.matches()
     matcher[0][1]
   }

3. Click on the Convert to GitLab CI/CD button and confirm that the workflow started is convert_to_gl_ci

   

   

   

4. Enable the FF

   Feature.enable(:convert_to_gl_ci_flow_registry, user)

5. Re-run step 3; confirm that this time the workflow is convert_to_gl_ci/v1

   

   

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/561264