phpstan does not recognize keys after array literal merge correctly #13805
Description
Bug report
phpstan should not report an error, since the keys are preserved and the needed key definitly exists due to MinimalRowDefinition
Code snippet that reproduces the problem
https://phpstan.org/r/1a11403d-e08d-4194-a516-7ead122e35d3
Expected output
phpstan should not report an error
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