Adjust AssetUsageProjection to use workspace instead of content stream id

[mhsdesign]

The AssetUsage needs to switch from contentStreamId to WorkspaceName from Projection until all depending DTOs.

• AssetUsageProjection
• AssetUsage
• AssetUsageFilter
• AssetUsageReference

With #5002 we have access to the WorkspaceName in the projections instead of only the ContentStreamId.

That means we can adjust the write side + read side. And the chain down to the AssetUsageReference incl. AssetUsageFilter. To use workspace names.

final readonly class AssetUsageNodeAddress
{
    public function __construct(
-       public ContentStreamId $contentStreamId,
+       public WorkspaceName $workspaceName,
        public DimensionSpacePoint $dimensionSpacePoint,
        public NodeAggregateId $nodeAggregateId,
    ) {
    }
}

... as well as the AssetUsage class.

Should fix the following todos and problematic usages of the contentStreamId:

• neos-development-collection/Neos.Neos/Classes/AssetUsage/Service/AssetUsageSyncService.php

  Line 58 in 67516e6

  // FIXME: AssetUsage->workspaceName ?

• neos-development-collection/Neos.Neos/Classes/Service/ImageVariantGarbageCollector.php

  Line 80 in ec803ee

  && $usageItem->getContentStreamId()->equals($node->subgraphIdentity->contentStreamId)

• https://github.com/neos/neos-development-collection/blob/9.0/Neos.Neos/Classes/Fusion/Cache/ContentCacheFlusher.php#L290