[Integrations] - Improve integration doc guidelines on document splitting #1851
Description
There are often SDHs and queries from users/customers on how they can split events into different documents using our agent integrations and ingest pipelines.
For example: Some users are under the impression that integrations such as our custom API integrations can also split an input dataset into separate documents based on some sort of pipeline manipulation or using the split processor of httpjson.
This is an incorrect assumption as this feature is not available within our ingest pipelines and is only possible in Logstash, using the Logstash split processor. We need to improve our integration documentation directing the users to the correct resource and clarify that such a feature is exclusive to only Logstash.
Ref: elastic/elasticsearch#56769
Until this get's implemented our docs needs to clarify this.