…_found` for imported config files (pulzarraider)This PR was merged into the 4.4 branch.Discussion----------[DependencyInjection] Added option `ignore_errors: not_found` for imported config files| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | yes| Tests pass?   | yes| Fixed tickets | -| License       | MIT| Doc PR        |symfony/symfony-docs#11647If someone want to add optional config file. The only available choice was to add `ignore_errors: true` optione.g.```imports:    - { resource: parameters.yml, ignore_errors: true }```But this will hide all errors in imported file. We ran in many situations that broke our Symfony applications because we had a typo in this imported files.This PR introduce new possible value `not_found` for `ignore_errors` option. It can be used for optional config files like the `ignore_errors: true`, but it will ignore only the file non-existence, not the possible syntax errors inside.Usage:```imports:    - { resource: parameters.yml, ignore_errors: not_found}```Commits-------e0ee01c [DependencyInjection] Added option `ignore_errors: not_found` while importing config files

…_found` for imported config files (pulzarraider)This PR was merged into the 4.4 branch.Discussion----------[DependencyInjection] Added option `ignore_errors: not_found` for imported config files<!--If your pull request fixes a BUG, use the oldest maintained branch that containsthe bug (seehttps://symfony.com/roadmap for the list of maintained branches).If your pull request documents a NEW FEATURE, use the same Symfony branch wherethe feature was introduced (and `master` for features of unreleased versions).-->Related merge request:symfony/symfony#31310Commits-------0a6873d [Configuration] Add documentation about `ignore_errors: not_found` option.