Store action urls consistent across action types

[tsteur]

• Event type should use TypeId 10 for idaction_url and not TypeId 1 (pageview)
• All values should be stored unsanitized (outlinks, downloads are stored sanitized I think)
• We should store the URL always normalized (with separate URL prefix), currently content type, outlinks and downloads are not stored normalized

This will make API and data more consistent.

[mattab]

Challenge with this change is that either:

• we need to migrate the data on upgrade,
• we need to keep a BC layer in Archiving to read the old and the new data,
• or we ignore the data problems and accept that there will be some data issues in reports. If so, we should document those and make it clear in changelog to everyone.

Also refs #4231