Improve release tools and documentation

[bouweandela]

Description

Updates to release tools and documentation

• Update the release schedule

• Use short links for various GitHub related URLs

• Minor improvements to the release instructions

• Much improved script to interpret and summarize slurm job logs for recipe runs

• Minor improvements to the tools for generating slurm job files and release notes

• • *

Before you get started

Checklist

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• [x] 🛠 This pull request has a descriptive title
• [x] 🛠 Code is written according to the code quality guidelines
• [x] 🛠 Documentation is available
• [x] 🛠 Tests run successfully
• [x] 🛠 The list of authors is up to date
• [x] 🛠 All checks below this pull request were successful

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[valeriupredoi]

@esmvalbot please run examples/recipe_python.yml

[esmvalbot[bot]]

Since @valeriupredoi asked, ESMValBot will run recipe examples/recipe_python.yml as soon as possible, output will be generated here

[esmvalbot[bot]]

ESMValBot is happy to report recipe examples/recipe_python.yml ran OK, output has been generated here

[bouweandela]

Thanks for reviewing! :sparkles: all issues should be fixed now.