Add tsd.core.meta.enable_tsuid_tracking config setting as an efficiency option
over tsd.core.meta.enable_tsuid_incrementing.
Add code to let users choose to PUT a 1 in the TSUID table every time a data
point is written instead of incrementing as an efficiency option for busy TSDs
over TSUID incrementing. AtomicIncrements can quickly OOM a TSD whereas Puts
are much more efficient. The downside is that we can't generate TSMeta objects
in real-time, but a batch scanner can easily handle that. We also don't get a
count of the data points inserted, but we still get the last time a point was
written.