Fix EZP-22308: store in db sortkey value (as in legacy) and return it while searching for relation
EZP-22817: Error running legacy scripts

Reference error on ezpKernelHandler instances in Kernel\Loader.
Merge pull request #849 from ezsystems/EZP-22817-legacy_scripts

EZP-22817: Error running legacy scripts
BDD: add delete ContentTypeGroup implementation
EZP-22799: add Solr Storage container compile passes
EZP-22799: add configuration for Solr Storage services
EZP-22799: add indexable field types configuration
EZP-22799: CS: fix indent
EZP-22799: disabled FieldMap caching as it can't work in this form
EZP-22799: configure legacy_solr storage engine
EZP-22799: configure Solr Storage compiler passes
EZP-22799: update bundle dependency injection extension
EZP-22799: configure PAPI container
EZP-22799: update LegacySolr integration test factory
EZP-22799: add purgeIndex() to Cache SearchHandler
EZP-22799: add indexing command
EZP-22799: fixed configuration parameter name
EZP-22799: reference follow-up issue
EZP-22799: move Solr Storage initialization to dedicated bundle
Merge pull request #847 from ezsystems/impl-EZP-22799-solr-storage-container

Implement EZP-22799: Configure Solr Storage engine in Symfony service container