[9.0] feat: add scitag support

[fstagni]

Only for FTS transfers (I do not think we want others...?).

• context: https://docs.google.com/presentation/d/1jXTbEWPQYrJRfXQ_5M-fNthJDJjNhxsFHJnVxwy840o/
• Documentation for scitag format in FTS: https://docs.google.com/document/d/1x9JsZ7iTj44Ta06IHdkwpv5Q2u4U2QGLWnUeN2Zf5ts/edit?pli=1&tab=t.0#heading=h.g5l8e2i6ufhu

BEGINRELEASENOTES

*DMS
NEW: add scitag to FTS transfers

ENDRELEASENOTES

---

PS: the scitag "API" is https://scitags.org/api.json. The "activityName" as coded should be match the "FTS3 activity", which is of course VO-specific. In LHCb it's coded as simple as:

    def inferFTSActivity(self, ftsOperation, rmsRequest, rmsOperation):
        """
        Tries to infer the FTS Activity
        """

        ### Data Challenge activity
        # All the tests with data challenges are done
        # on SE with '-DC-' in their name
        targetSEs = rmsOperation.targetSEList
        if any("-DC-" in se for se in targetSEs):
            return "Data Challenge"

        return super().inferFTSActivity(ftsOperation, rmsRequest, rmsOperation)

(pay attention that here it's spelled "Data Challenge" while in the scitag API is "DataChallenge".