New Sniff: target="_blank"

## What problem would the enhancement address for VIP?
There's a potential issue with using `target="_blank"` and not using `rel="noopener"` or `rel="noreferrer"`.
See: https://web.dev/external-anchors-use-rel-noopener/

## Describe the solution you'd like

Maybe warn about this if we see `noopener` or `noreferrer` present?

## What code should be reported as a violation?

`Link`

## What code should *not* be reported as a violation?

`Link`

OR

`Link`

Empieza revisando los sniffs existentes del repositorio y las reglas de PHP_CodeSniffer para comprobar cómo se inspeccionan los atributos de anclaje. Confirma que se informa de un con target="_blank" a menos que rel contenga noopener o noreferrer, y que se aceptan los dos ejemplos conformes.

Escrito por el modelo de indexación a partir del texto del issue.