* Extend storage service protobuf with TagKeys and TagValues
Co-authored-by: Michael Desa <mjdesa@gmail.com>
Co-authored-by: Jacob Marble <jacobmarble@influxdata.com>
* Extend the reads.Store interface with new TagKeys and TagValues APIs
* Extend readservice.store to implement refactored reads.Store interface
* Implement a StringIterator gRPC writer / serializer
* Implement a StringIterator gRPC reader / deserializer
* Implement a StringIterator merger
I did this with a dumb editor macro, so some comments changed too.
Also rename root package from platform to influxdb.
In interest of minimizing risk, anyone importing the root package has
now aliased it to "platform" so that no changes beyond imports were
necessary in those files.
Lastly, replace the old platform module to local path /dev/null so that
nobody can accidentally reintroduce a platform dependency while
migrating platform code to influxdb.