Add {arlolra, cohosh, dcf, phw} to default Cc of Circumvention/Snowflake tickets

Recently the Obfuscation/Snowflake component was renamed to Circumention/Snowflake. The change seems to have lost the default Cc that was set up in #23860 (moved). See comment:1:ticket:30510 for example. Is it possible to have these users Cced by default in new Circumvention/Snowflake tickets?

arlolra cohosh dcf phw

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