Assure ORM 3 compatibility with property field mappings

[eliashaeussler]

With doctrine/orm#10607, property field mappings were extracted in a separate DTO. However, phpstan/phpstan-doctrine does not yet support the modified type and results in an error like follows:

Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, Doctrine\ORM\Mapping\FieldMapping given in /xxx/vendor/phpstan/phpstan-doctrine/src/Rules/Doctrine/ORM/PropertiesExtension.php:51
#0 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Rules/DeadCode/UnusedPrivatePropertyRule.php(103): PHPStan\Rules\Doctrine\ORM\PropertiesExtension->isAlwaysWritten(Object(PHPStan\Reflection\Php\PhpPropertyReflection), 'id')
#1 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/FileAnalyser.php(107): PHPStan\Rules\DeadCode\UnusedPrivatePropertyRule->processNode(Object(PHPStan\Node\ClassPropertiesNode), Object(PHPStan\Analyser\MutatingScope))
#2 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(669): PHPStan\Analyser\FileAnalyser->PHPStan\Analyser\{closure}(Object(PHPStan\Node\ClassPropertiesNode), Object(PHPStan\Analyser\MutatingScope))
#3 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(401): PHPStan\Analyser\NodeScopeResolver->processStmtNode(Object(PhpParser\Node\Stmt\Class_), Object(PHPStan\Analyser\MutatingScope), Object(Closure), Object(PHPStan\Analyser\StatementContext))
#4 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(640): PHPStan\Analyser\NodeScopeResolver->processStmtNodes(Object(PhpParser\Node\Stmt\Namespace_), Array, Object(PHPStan\Analyser\MutatingScope), Object(Closure), Object(PHPStan\Analyser\StatementContext))
#5 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/NodeScopeResolver.php(370): PHPStan\Analyser\NodeScopeResolver->processStmtNode(Object(PhpParser\Node\Stmt\Namespace_), Object(PHPStan\Analyser\MutatingScope), Object(Closure), Object(PHPStan\Analyser\StatementContext))
#6 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/FileAnalyser.php(166): PHPStan\Analyser\NodeScopeResolver->processNodes(Array, Object(PHPStan\Analyser\MutatingScope), Object(Closure))
#7 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Analyser/Analyser.php(72): PHPStan\Analyser\FileAnalyser->analyseFile('/xxx/...', Array, Object(PHPStan\Rules\LazyRegistry), Object(PHPStan\Collectors\Registry), NULL)
#8 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Command/AnalyserRunner.php(62): PHPStan\Analyser\Analyser->analyse(Array, Object(Closure), NULL, true, Array)
#9 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Command/AnalyseApplication.php(210): PHPStan\Command\AnalyserRunner->runAnalyser(Array, Array, Object(Closure), NULL, true, true, '/xxx/...', Object(_PHPStan_11268e5ee\Symfony\Component\Console\Input\ArgvInput))
#10 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Command/AnalyseApplication.php(101): PHPStan\Command\AnalyseApplication->runAnalyser(Array, Array, true, '/xxx/...', Object(PHPStan\Command\Symfony\SymfonyOutput), Object(PHPStan\Command\Symfony\SymfonyOutput), Object(_PHPStan_11268e5ee\Symfony\Component\Console\Input\ArgvInput))
#11 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/src/Command/AnalyseCommand.php(200): PHPStan\Command\AnalyseApplication->analyse(Array, false, Object(PHPStan\Command\Symfony\SymfonyOutput), Object(PHPStan\Command\Symfony\SymfonyOutput), false, true, '/xxx/...', Array, Object(_PHPStan_11268e5ee\Symfony\Component\Console\Input\ArgvInput))
#12 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/vendor/symfony/console/Command/Command.php(259): PHPStan\Command\AnalyseCommand->execute(Object(_PHPStan_11268e5ee\Symfony\Component\Console\Input\ArgvInput), Object(_PHPStan_11268e5ee\Symfony\Component\Console\Output\ConsoleOutput))
#13 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/vendor/symfony/console/Application.php(870): _PHPStan_11268e5ee\Symfony\Component\Console\Command\Command->run(Object(_PHPStan_11268e5ee\Symfony\Component\Console\Input\ArgvInput), Object(_PHPStan_11268e5ee\Symfony\Component\Console\Output\ConsoleOutput))
#14 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/vendor/symfony/console/Application.php(261): _PHPStan_11268e5ee\Symfony\Component\Console\Application->doRunCommand(Object(PHPStan\Command\AnalyseCommand), Object(_PHPStan_11268e5ee\Symfony\Component\Console\Input\ArgvInput), Object(_PHPStan_11268e5ee\Symfony\Component\Console\Output\ConsoleOutput))
#15 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/vendor/symfony/console/Application.php(157): _PHPStan_11268e5ee\Symfony\Component\Console\Application->doRun(Object(_PHPStan_11268e5ee\Symfony\Component\Console\Input\ArgvInput), Object(_PHPStan_11268e5ee\Symfony\Component\Console\Output\ConsoleOutput))
#16 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/bin/phpstan(124): _PHPStan_11268e5ee\Symfony\Component\Console\Application->run()
#17 phar:///xxx/vendor/phpstan/phpstan/phpstan.phar/bin/phpstan(125): _PHPStan_11268e5ee\{closure}()
#18 /xxx/vendor/phpstan/phpstan/phpstan(8): require('phar:///xxx/...')
#19 /xxx/vendor/bin/phpstan(119): include('/xxx/...')
#20 {main}

This PR tries to fix the issue in a way that both variants (array [ORM 2] & DTO [ORM 3]) are still supported.

Tested and verified with v1.3.60 of phpstan/phpstan-doctrine.

[ondrejmirtes]

Thank you, but I chose a different fix e978bec