Rename stuck jobs to idle jobs

[wangch079]

Part of https://github.com/elastic/enterprise-search-team/issues/3727

This PR renames stuck jobs to idle jobs, including comments, variable names and method names.

Checklists

Pre-Review Checklist

• [ ] Covered the changes with automated tests
• [x] Tested the changes locally
• [x] Added a label for each target release version (example: v7.13.2, v7.14.0, v8.0.0)
• [ ] Considered corresponding documentation changes
• [ ] Contributed any configuration settings changes to the configuration reference

[wangch079]

Approving, but to double check - what's the purpose of working on Ruby connectors framework now?

It's required by this issue https://github.com/elastic/enterprise-search-team/issues/3727. We will still have ruby deployed on Cloud for 8.7, and we don't want stuck jobs printed in the log.

[github-actions[bot]]

💔 Failed to create backport PR(s)

The backport operation could not be completed due to the following error: You must specify a valid Github repository

You can specify it via either:

• Config file (recommended): ".backportrc.json". Read more: https://github.com/sqren/backport/blob/e119d71d6dc03cd061f6ad9b9a8b1cd995f98961/docs/configuration.md#project-config-backportrcjson
• CLI: "--upstream elastic/kibana"

The backport PRs will be merged automatically after passing CI.

To backport manually run: backport --pr 535 --autoMerge --autoMergeMethod squash

[wangch079]

💚 All backports created successfully

Status	Branch	Result
✅	8.7

Note: Successful backport PRs will be merged automatically after passing CI.

Questions ?

Please refer to the Backport tool documentation