[Meta] Checklist for Deprecating Hadoop 1.x Support and the Elasticsearch on YARN Project

[acchen97]

Checklist for upcoming deprecations in 5.5. Addresses #1000.

Deprecating Hadoop 1.x Support

• Support notice
• Deprecation blog post
• Docs updates
  • Deprecation note
  • Remove distribution test list

Deprecating Elasticsearch on YARN

• Deprecation note in docs
• Deprecation note in Github repo

[jbaiera]

Closing this as the deprecations have been broadcast through all channels