Evaluate / Implement Join Feature

[solverat]

Q	A
Bug report?	no
Feature request?	yes
BC Break report?	no
RFC?	no

Goal: Support the join type feature in ES/OS

• Add another getter/setter in IndexDocument: getPersistenceConfiguration() - which allows the ES/OS Provider to enrich the commit method (setting the routing parameter, for example, is required within the join feature)
• Add example to both repositories
• Evaluate/respect bulk commits

Repositories:

• https://github.com/dachcom-digital/pimcore-dynamic-search-index-provider-elasticsearch
• https://github.com/dachcom-digital/pimcore-dynamic-search-index-provider-opensearch