At times snowflake id generation would create org and bucket IDs with
characters that had special meaning for the storage engine.
The storage engine concats the org and bucket bytes together into a
single 128 bit value. That value is used in the old measurement
section. Measurement was transformed into the tag, _measurement.
However, certain properties of the older measurement data location
are still required for the org/bucket bytes. We cannot have
commas, spaces, nor backslashes.
This PR puts a specific ID generator in place during the creation of
orgs and buckets. The IDs are just random numbers but with each
of the restricted chars incremented by one. While this changes the
entropy distribution somewhat, it does not matter too much for our
purposes.
... because now org and bucket ids are checked for previous existence
transactionally in the key-value stores. If the ID does already exist
then we try to generate a new key up to 100 times.
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