ClickHouse parameterized view

I'd like to parse ClickHouse SQL which contains parameters for their [parameterized views](https://clickhouse.com/docs/en/sql-reference/statements/create/view#parameterized-view). The SQL looks like

`CREATE VIEW view AS SELECT * FROM TABLE WHERE Column1={column1:datatype1}`

Note the parameter is in the { } brackets. I don't think this could be implemented in the `Dialect` as curly braces are tokenized without deferring to the dialect. It would probably have to be handled by the tokenizer as a special case like numbers are for MySQL & Hive.

Comece pelo tratamento, no tokenizer, dos casos especiais numéricos de MySQL e Hive; em seguida, examine como os tokens de chaves são emitidos antes do processamento de Dialect. O trabalho estará concluído quando o parser aceitar a forma mostrada de view parametrizada do ClickHouse, preservando o comportamento existente das chaves.

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