Support for SOUNDEX expression, restrict to MySQL, MSSQL, Oracle, and Generic Dialect

[AugustoFKL]

Add support for SOUNDEX expressions from MySQL (1), Microsoft SQL Server (2), and Oracle (3).

Soundex is also existent for Snowflake (4) and Bigquery (5) with an almost identical structure. Therefore, there's no reason to restrict its dialects.

[1] : https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_soundex
[2] : https://learn.microsoft.com/pt-br/sql/t-sql/functions/soundex-transact-sql?view=sql-server-ver16
[3] : https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions148.htm
[4] : https://docs.snowflake.com/en/sql-reference/functions/soundex.html
[5] : https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#soundex