09dbed766d
This PR was squashed before being merged into the 3.4 branch (closes #23845).
Discussion
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[Validator] Add unique entity violation cause
| Q | A
| ------------- | ---
| Branch? | 3.4 or master
| Bug fix? | no
| New feature? | yes/no <!-- don't forget updating src/**/CHANGELOG.md files -->
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | -
| License | MIT
| Doc PR | n/a
This PR adds unique entity validation error cause which can be array of entities to constraint violation
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Symfony |