Onetag update (#2134)

* OneTag bidder params

* gdpr support onetag

* Add support to CCPA

* added strings around pubId param

* Updates documentation for the 'pubId' field. Introduces documentation for the 'ext' field.

Co-authored-by: valentino <v.v@v.v>
Co-authored-by: bretg <bgorsline@gmail.com>
Co-authored-by: francesco <f.orazini@onetag.com>

dev-docs/bidders/onetag.md

@@ -17,7 +17,8 @@ userIds: britepoolId, criteo, id5Id, identityLink, liveIntentId, netId, parrable
 
 | Name    | Scope    | Description                       | Example      | Type     |
 |---------|----------|-----------------------------------|--------------|----------|
-| `pubId` | required |                                   | `'386276e072'` | `string` |
+| `pubId` | required | The publisher's ID provided by OneTag | `'386276e072'` | `string` |
+| `ext`   | optional | A set of custom key-value pairs | `{ customKey: customValue }` | `object` |
 
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