Issue-39692 Widget Block Selection issue fix - If block have same identifier

[Mohamed-Asar]

Description (*)

Used block id for widget_parameters instead of block identifier, allowing users to configure blocks with the same identifier across multiple store views.

Fixed Issues (if relevant)

1. Fixes Block selection in widgets that have the same identifier #39692

Manual testing scenarios (*)

1. Create Two Store Views.
2. Create Two CMS Blocks, one for each store view, using the same identifier.
3. Create Two Widgets, one for each store view, and assign the respective CMS blocks.
4. The corresponding CMS block should be displayed in the widget for each store view.

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

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[Mohamed-Asar]

@magento run all tests

[Mohamed-Asar]

@magento run all tests