CMS Blocks are identified by `id`, not `identifier`

[lbajsarowicz]

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Preconditions (*)

1. Magento 2.3.4

Steps to reproduce (*)

1. Create CMS page
2. Add CMS Block using PageBuilder

Expected result (*)

1. The source should refer to CMS Block by identifier

{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_identifier="sample_block" type_name="CMS Static Block"}}

Actual result (*)

1. CMS block has id hardcoded

{{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="16" type_name="CMS Static Block"}}

Business Case

1. Merchant has 2 websites
2. He wants to have similar Home Page with only one different block
3. He doesn't want to maintain 2 pages each for the website - that is why we inject 1 block, that is declared per-scope

With block declared with ID, you still need to have 2 versions of a page. With CMS Block identified by identifier, GetBlockByIdentifier is going to take care about the scope.

Developer Experience

1. Installing Block with Data Patch
2. I want to refer the created block from CMS Page

Without the block reference by identifier - I need to get block by identifier manually and then update the CMS page to refer the block created by Data Patch.