Fix/17179 block grid data label

[Bakersbakebread]

Description

This pull request introduces refactorings to the UmbBlockGridEntriesElement and related context classes. The most important changes include adding new state properties to manage labels, updating methods to utilize these properties

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)

Enhancements to Label Management:

• Added @state properties _resolvedCreateLabel and _createLabel to UmbBlockGridEntriesElement to manage dynamic label content. (src/packages/block/block-grid/components/block-grid-entries/block-grid-entries.element.ts)
  ** Introduced #finalizeCreateLabel method to determine the appropriate label text based on context and state. (src/packages/block/block-grid/components/block-grid-entries/block-grid-entries.element.ts)
• Updated the button label in the template to use _resolvedCreateLabel. (src/packages/block/block-grid/components/block-grid-entries/block-grid-entries.element.ts)

Context Class Updates:

• Added #createLabel state and corresponding observable in UmbBlockGridEntriesContext. (src/packages/block/block-grid/context/block-grid-entries.context.ts)
• Observed createLabel from UmbBlockGridManagerContext and updated #createLabel in UmbBlockGridEntriesContext. (src/packages/block/block-grid/context/block-grid-entries.context.ts)
• Added createLabel observable part in UmbBlockGridManagerContext to provide label configuration. (src/packages/block/block-grid/context/block-grid-manager.context.ts)

fixes umbraco/Umbraco-CMS#17179

[IbrahimMNada]

i think this is fixed on #2345 , with more generic reusable way

[madsrasmussen]

This has been fixed as part of this PR, which also takes the Create Label of Areas into account:
#2424