chore(updatecli): factorize helm chart manifests

[lemeurherve]

This PR factorizes helm chart manifests like what have been done for service principal writer end dates in https://github.com/jenkins-infra/azure.

It adds a charts entry in ./updatecli/values.yaml to define every information needed for helm chart manifests:

• Chart name
  • Repository name (default: jenkins-infra)
  • Repository URL (default: https://jenkins-infra.github.io/helm-charts)
  • Targets
  • Additional labels (used for jenkinsistheway)

Two manifests have been moved from ./updatecli/updatecli.d/charts to ./updatecli/updatecli.d/ as they were not helm chart version bump manifests but specialized ones:

• updatecli/updatecli.d/jenkins-agents-infra.ci.jenkins.io.yaml
• updatecli/updatecli.d/jenkins-infra-tools-maven.yaml

Tested locally one by one then globally with updatecli diff --values updatecli/values.yaml --config updatecli/updatecli.d/charts.tpl.

From https://infra.ci.jenkins.io/job/updatecli/job/kubernetes-management/job/PR-5419/2/console:

 Run Summary
 ===========
 Pipeline(s) run:
   * Changed:	5
   * Failed:	0
   * Skipped:	0
   * Succeeded:	39
   * Total:	44

Fixes:

• Use a template for helm chart version bumps with updatecli instead of multiplying manifests #5420

[lemeurherve]

Added targets that were not covered before this PR in e157083

[lemeurherve]

Closed as no time for infra team to review before end of August.