Add draft release notes for v2.11.0rc1

[chrisbillowsMO]

Description

Closes #2413.

---

Before you get started

• [x] ☝ Create an issue to discuss what you are going to do

Checklist

It is the responsibility of the author to make sure the pull request is ready to review. The icons indicate whether the item will be subject to the 🛠 Technical or 🧪 Scientific review.

• [x] 🛠 This pull request has a descriptive title and labels

• [x] 🛠 All checks below this pull request were successful

---

To help with the number pull requests:

• 🙏 We kindly ask you to review two other open pull requests in this repository

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.51%. Comparing base (66136df) to head (ac06fbf).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2414 +/- ## ======================================= Coverage 94.51% 94.51% ======================================= Files 246 246 Lines 14020 14020 ======================================= Hits 13251 13251 Misses 769 769 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[chrisbillowsMO]

Looking good already! Could you make the names of preprocessor functions links, e.g. replace _regridtime by

:func:`esmvalcore.preprocessor.regrid_time`

etc? And take care to make monospace strings render like that, i.e. use double backtics instead of single ones?

All Sphinx formatting should be fixed here: 65f9277ca

[chrisbillowsMO]

Hey look we did a thing! 😁🚀

https://esmvaltool--2414.org.readthedocs.build/projects/ESMValCore/en/2414/changelog.html#v2-11-0