Indexer implementation changes

As part of a major search and re-indexing performance optimization, several public search and indexing APIs have been simplified.

Custom indexer implementations extending BaseIndexer must rename their doReindex(String[] ids) override to doReindexCompany(long companyId).
Modules using ModelIndexerWriterContributor will need minor updates as helper classes (BatchIndexingActionable, ModelIndexerWriterDocumentHelper) have been removed in favor of direct use of their underlying equivalents.
The Queries OSGi service has been replaced by the static QueriesUtil, and a small number of other search API methods have had parameters removed or their types updated to reflect their actual usage

Please see full breaking changes list for details.