[GraphQL] Place Order resolver error messages are not displayed

[makkoff]

Preconditions and environment

• Magento 2.4.7-p1
• We use Adobe PWA Studio, but I think it's should be reproducible by using GraphQL only

In 2.4.7 Mageno removed the error formatter and started using a constant and now all custom error messages are returned with error code “UNDEFINED".
\Magento\QuoteGraphQl\Model\Resolver\PlaceOrder resolver returns errors as expected by the new logic:

but then the actual response is formatted in \GraphQL\Executor\ReferenceExecutor::collectAndExecuteSubfields, it collects some subfields(??):

and returns it instead of errors…

Steps to reproduce

1. Add product to cart
2. Place order, but it should throw any error during the process

Expected result

Order placing is failed, but we are getting correct error message.

Actual result

Additional information

No response

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @makkoff. Thank you for your report.
To speed up processing of this issue, make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce.

• For more details, review the Magento Contributor Assistant documentation.
• Add a comment to assign the issue: @magento I am working on this
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