frontend: Remove tracking options from `bst build`
BREAKING CHANGE: Remove all tracking related options and flags from
bst build
command, as discussed on mailing list previously.
See https://mail.gnome.org/archives/buildstream-list/2019-October/msg00009.html for the original proposal, and https://mail.gnome.org/archives/buildstream-list/2019-October/msg00024.html for a summary.
At the same time, remove use of the removed options from our test suite.
In this merge request, I am only proposing the minimal changes that are required to remove the options from the frontend. However, once this change is in, it should allow us to do other refactors/simplifications in other parts of the codebase. I propose that we keep track of those in a separate issue.