User might pass a value that they don't expect to
be kept in trace storage. For example some cache backends
allow passing authentication tokens with a flag.
Instead use known primary config values as attributes
of the root span.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Update buildkit dependency to v0.14.0-rc1. Update the tracing
infrastructure to use the new detect API which updates how the delegated
exporter is configured.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>