Add badges that link to downstream DS 3.x jobs

[nickboldt]

Is your task related to a problem? Please describe

To make it easier to find the Dev Spaces 3.x jobs ( https://main-jenkins-csb-crwqe.apps.ocp-c1.prod.psi.redhat.com/job/DS_CI/ ) we could add badges to the projects' readmes.

Describe the solution you'd like

Add links to these repos:

• che-code,
• che-operator,
• che-dashboard,
• plugin registry (with note that downstream is a fork, not a sync)
• devfile registry (with note that downstream is a fork, not a sync)
• https://github.com/eclipse-che/che-server
• https://github.com/che-incubator/chectl
• https://github.com/che-incubator/jetbrains-editor-images
• https://github.com/eclipse-che/che-machine-exec

Describe alternatives you've considered

No response

Additional context

No response

[nickboldt]

Ready for review / merge:

• chore: #21790 add badges for some actions and a link to downstream 3.x job che-incubator/che-code#138
  • chore: badges link to workflows; also remove PR publish per Artem's suggestion (#21790) che-incubator/che-code#140
• chore: #21790 add badges for some actions and a link to downstream 3.x job che-operator#1548
  • chore: make badges links to the workflow itself (#21790) che-operator#1553
• chore: #21790 add badges for some actions and a link to downstream 3.x job che-dashboard#658
  • chore: badges link to workflows (#21790) che-dashboard#662
• chore: #21790 add badges for some actions and a link to downstream 3.x job che-incubator/chectl#2344
  • chore: badges link to workflows... che-incubator/chectl#2359
• chore: #21790 add badges for some actions and a link to downstream 3.x job che-devfile-registry#679
• chore: #21790 add badges for some actions and a link to downstream 3.x job che-plugin-registry#1451
• chore: #21790 add badges for some actions and a link to downstream 3.x job devfile/developer-images#44
• chore: #21790 add badges for some actions and a link to downstream 3.x job che-server#380
• chore: #21790 add badges for some actions and a link to downstream 3.x job che-incubator/jetbrains-editor-images#136
• chore: #21790 add badges for some actions and a link to downstream 3.x job che-machine-exec#218

[nickboldt]

Suggested improvement from @RomanNikitenko:

Link to the action instead of the badge, eg.,

So, will submit followup PRs for those above &/or fix the unmerged ones.

Also @azatsarynnyy suggested that we reduce the list of badges to just these two for che-code:

• image-publish and
• Release Che Code