[sequelize-raw-query] - Literal pattern

[qu35t-code]

Hello,

This PR adds patterns to find SQL injections via sequelize literal() function.

Sequelize documentation : https://sequelize.org/docs/v6/other-topics/sub-queries/

Playground rule : https://semgrep.dev/playground/r/OrUN1z3/qu35t.sequelize-raw-query

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[0xDC0DE]

Hey @qu35t-code , these look like they are nice additions to the rule. Thanks for your contribution!