Add workspaceName to relevant events

[bwaidelich]

With #4694 we made an important step towards internalizing the concept of content streams.
But so far, in the events we only include the resolved contentStreamId.

As a result, projections and catchUpHooks have to keep track/load the corresponding workspace.
Instead we should include the workspaceName in the corresponding event payloads, not to lose the information about that original intend

Notes

• Obviously this will require another infamous event migration
  • We'll might have to decide how to deal with CS ids that are no longer resolvable to a workspace name
• I assume that all events implementing EmbedsContentStreamAndNodeAggregateId are affected, so maybe it makes sense to extend (and rename) that interface
  • But maybe there are more events affected (e.g. there is DimensionShineThroughWasAdded and DimensionSpacePointWasMoved) so an new interface might be required
• Afterwards, affected Neos projections (e.g. ChangeProjection and UriPathProjection) should be simplified such that they no longer keep track of the workspace

Related: #4694