!!! TASK: Make node label pure neos concept

[mhsdesign]

Solves partially #5019

Upgrade instructions

To get the label for a Node in PHP, one must replace Node::getLabel() with a call to Neos\Neos\Domain\NodeLabel\NodeLabelGeneratorInterface::getLabel:

+  #[Flow\Inject]
+ protected NodeLabelGeneratorInterface $nodeLabelGenerator;
+ 
+ $this->nodeLabelGenerator->getLabel($node);
- $node->getLabel();

In Fusion accessing the label via ${node.label} will currently no longer work but one can leverage the flowquery ${q(node).label()} to get the label.

Additionally NodeType::getNodeLabelGenerator has been removed. Please inject the NodeLabelGeneratorInterface instead.

Review instructions

Followup node.label viewhelper for fluid (see also #5023)
Rector migrations will be provided as part of neos/rector#57

The Label concept was removed from the core as it requires by its current implementation that the NodeType is available in the Node. Though there are ways to work around this by adding a label to the nodes constructor via some factory, seeing that the label is not used once in the core made us realise that this is just an arbitrary convenience thing attached to the core. To better have Neos' decide what it wants and how implementation / extensibility and co should look like we remove this concern from the core to also ease standalone use-cases.

Checklist

• Code follows the PSR-2 coding style
• Tests have been created, run and adjusted as needed
• The PR is created against the lowest maintained branch
• Reviewer - PR Title is brief but complete and starts with FEATURE|TASK|BUGFIX
• Reviewer - The first section explains the change briefly for change-logs
• Reviewer - Breaking Changes are marked with !!! and have upgrade-instructions

[bwaidelich]

Nice, I like!
Just a comment re asset vs node label and IMO we should make NodeLabelRenderer::getNodeLabelGeneratorForNodeType() private

[mhsdesign]

The tests fail currently because Neos requires the Ui as well which is a bug: #4951 (comment)

But when the ui is adjusted everything will work: neos/neos-ui#3772

fixed, thx

[mhsdesign]

We discussed that we want rather a flowquery operation for this for simplicity.
Also i plan to make beta 10 not super super breaky but maybe even little forgiving so we can add this b/c and remove it with 11:
The whole Node read model will consist of 50% deprecated code then mostly already because of #5042 but thats fine imo this one time.

/**
 * Returned the node label as generated by the configured node label generator.
 *
 * In PHP please use Neos' {@see NodeLabelRenderer} instead.
 * 
 * For Fusion please use the FlowQuery operation:
 * ```
 * ${q(node).label()}
 * ```
 *
 * @deprecated will be removed before the final 9.0 release
 */
public function getLabel(): string
{
    // highly illegal
    return (new NodeLabelRenderer())->renderNodeLabel($this);
}