…protected properties in reflection extractor (joelwurtz)This PR was squashed before being merged into the 4.3-dev branch (closes#30706).Discussion----------[PropertyInfo] Add possibility to extract private and protected properties in reflection extractor| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets |#30248| License       | MIT| Doc PR        | TODOThis PR add the possibility to extract private and protected properties from a class by passing a new argument to the `ReflectionExtractor`This new argument consist of flag that filters properties, so someone will also be able to use the `ReflectionExtractor` only for private property```phpnew ReflectionExtractor(null, null, null, true, ReflectionExtractor::ALLOW_PRIVATE | ReflectionExtractor::ALLOW_PROTECTED)```Flags method was prefered over a list of bool to avoid too many parameters and also be close to the reflection API of PHPCommits-------05e487f [PropertyInfo] Add possibility to extract private and protected properties in reflection extractor

…cted (joelwurtz)This PR was merged into the 4.3-dev branch.Discussion----------[PropertyInfo] Add missing changelog for private / protected| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | somehow| New feature?  | no| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets || License       | MIT| Doc PR        |Add missing changelog for#30706Commits-------8c5663d Add missing changelog for private / protected

This PR was squashed before being merged into the master branch (closes#11247).Discussion----------Documented the new Unique constraintDocumentssymfony/symfony#30706Commits-------4b2007e Documented the new Unique constraint