Release process hijinx

[runspired]

• make it clear upstream needs to be set
• lts release bumps patch version when it's just a "new channel", is this necessary?
• update guidance for using lerna-changelog always, not just lts
• lerna-changelog generates for every alpha, this is annoying, can we auto-collapse to minor/major?
• should we drop internal/house commits?
• we should update azure-pipelines ember-try guidance to reference github actions
• can we automate the changelog step further?
• can we auto publish release notes?