UUID is now part of SCALAR

[TarantoolBot]

The UUID field type is now part of the SCALAR field type. This means
that now values of type UUID can be inserted into the SCALAR field, and
these values can participate in the sorting of the SCALAR fields. The
order is as follows: boolean < number < string < varbinary < uuid.
Requested by @ImeevMA in tarantool/tarantool@5ea5001.

[pgulutzan]

#2151 #2176 #2177 #2190 are all SQL/UUID changes to be done as part of #2189.

[pgulutzan]

Issue#2201 is merged but there are a few words that needed to be added. See pull request in issue#2235.