Support COLLATE clause

[abcd-ts]

4.2. 評価式

example

select name
from tbl
order by name collate `ja_JP.UTF8`

error

Unexpected syntax error: ensure_kind(): excepted node is order_expression, but actual ERROR
  |
3 | order by name collate `ja_JP.UTF8`
  |          ^^^^^^^^^^^^ Appears as "ERROR" node on the CST
  |