[RUM Profiler] Improvements around Views and Long Tasks

[thomasbertet]

Motivation

• Attribute view.ids had a s that was not coherent with other attributes.
• Views are missing from the exported JSON.
• Long Tasks are missing the RUM Long Task id (when available)
• Long Tasks are full PerformanceEntry objects, and we don't need most of it.

Changes

• Fix how we capture views so that we now report them properly.
• Add name to view entry so that Profiling BE can do aggregation using that name. In the UI it would ultimately use the viewId to get the latest name.
• Make sure attribute fields are coherent.
• Add id to the Long Task entry, and make it a lighter object than the full performance entry.

Testing

• Tested locally and in staging that everything is now reported.

• In staging, you can :

  • Open any page,
  • Stay on a single page from the initial page load
  • Assert that the profile sent has a unique view.
  • Assert Long tasks now have id when applicable.

• [x] Local

• [x] Staging

• [x] Unit

• [ ] End to end

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I have gone over the contributing documentation.