sql: introduce UUID field type

This patch introduces UUID to SQL. UUID is now available as a new field
type.

Part of #5886

@TarantoolBot document
Title: Field type UUID is now available in SQL

The UUID field type is now available in SQL. This means that we can
create spaces and indexes with UUID, use it in SELECT, UPDATE and
DELETE. UUID can be accepted and returned by built-in functions and
user-defined functions.

According to the comparison rules, there will be no implicit casting in
the comparison. This rule also applies to UUID values: if a value is not
part of a SCALAR field, it cannot be compared to a value of any other
type. If the value is in a SCALAR field, it can be compared to any other
scalar value according to the comparison rules for a SCALAR field.

In case a UUID value is used in an operation that is not a comparison,
it can be implicitly converted to STRING or VARBINARY.

If a STRING or VARBINARY value is used in an operation that is not a
comparison, it can be implicitly converted to a UUID.

UUID value can always be explicitly converted to STRING or VARBINARY.

A STRING or VARBINARY value can be explicitly converted to a UUID if it
conforms to the UUID standard.