chore: rename jdk scripts and add updatecli manifest

[lemeurherve]

This PR renames the jdk scripts introduced in #786 according to jenkins-infra/shared-tools#148 and add updatecli manifests to track their changes from an unique source:

Having a common source for these scripts will allow adding updatecli manifests in these repositories to track their changes from a single source of trust while controlling their lifecycle independently.

It would also allow introducing tests for these scripts that could be run from the pipeline of this repo without needing them in all consumer repositories.

Follow-up of:

• feat: add jdk download scripts from jenkinsci/docker jenkins-infra/shared-tools#147
• chore(adoptium): rename scripts and apply shellcheck jenkins-infra/shared-tools#148

I've intentionally kept the existing scripts content to validate the new updatecli manifests after this PR.

Testing done

Ran a linux images build + updatecli diff locally

Submitter checklist

Preview Give feedback

1. Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
2. Ensure that the pull request title represents the desired changelog entry
3. Please describe what you did
4. Link to relevant issues in GitHub or Jira
5. Link to relevant pull requests, esp. upstream and downstream changes
6. Ensure you have provided tests - that demonstrates feature works or fixes the issue