[Breaking Change] Add multi-partition support in Indexer Queue

Indexer Queue is implemented as an Azure function which can bind to only one topic of one service bus. Since we have a different service bus for every partition, this means that the function can listen to messages from only one data partition.

In order to add multi-partition support in Indexer Queue, implement it as a Spring Boot Application instead and use the service bus java SDK to create clients to listen to every service bus present.