This removes some of the last mentions of the AppVeyor name. Don't change the title, we don't want the word to appear in the CLs
Also problem: the last references are in the changelogs but I don't want to modify them without committee approval.
## PR Context
it was removed, #8686
Add test roadmap plan document
Update document with clarifying language for code coverage
Also add an acceptance criteria for remoting tests
include Jenkins with mention of MS Build Lab for possible test infrastructure
