Add services to search for all elements and their dependencies

This PR solves the folowing aspects:

Move OpenSearch index alias handling to separate IndexAliasService
Improve the logic for generating the global data-object index alias for searching through all data objects.
Add data object folder indexing and search
Add a new global element-search index alias for searching through all elements (assets, data objects, documents)
Add a ElementSearchService to search for all element types in parallel.
Add the element's dependencies to it's search index.
Add search modifiers to be able to filter by requires and required-by dependencies.

pimcore / generic-data-index-bundle