Automate OpenAI assistant reconfiguration and fetching content

[pkosiec]

Description

Changes proposed in this pull request:

• Add "purge" option for botkube.io/blog/* + botkube.io/learn/* in docs fetcher (disabled by default)
• Describe release process here in Readme: https://github.com/kubeshop/botkube-cloud-plugins?tab=readme-ov-file#release
  • Every Botkube Cloud plugins release will refetch all files and update assistant
• Update GitHub actions release job for Botkube Cloud plugins
  • Fetch docs and update AI assistant during release, with botkube.io/blog/* + botkube.io/learn/* purge disabled
• Fix vertex store deletion for different envs
• Update release process in https://docs.botkube.io/community/contribute/release Describe further steps after Botkube OS and Docs releases botkube-docs#322
  • Mention to release Botkube Cloud plugins every Botkube release (without details)

Testing

No need to test - see the pipelines:

• Reconfigure Assistant: https://github.com/kubeshop/botkube-cloud-plugins/actions/runs/9016423324/job/24772988966
• Fetch content: https://github.com/kubeshop/botkube-cloud-plugins/actions/runs/9016628993/job/24773591143
  • PR: https://github.com/kubeshop/botkube-cloud-plugins/pull/27/files#diff-21c4122cd011486a17414a67f7db9bc4aef933c91bc30927274a00b3b3cdce9c

Related issue(s)

Resolves https://github.com/kubeshop/botkube-cloud/issues/956

[mszostok]

Looks like Jina.ai API is not stable 😅