PSeitz-dd

Results 2 issues of PSeitz-dd

### What does this PR do? remove `target_type` from the remapper step. `target_type` seems to be there by accident. It also has conflicting content with `targetType` ### Motivation I use...

integration/elastic
team/logs-backend
ecosystems/review-requested
product/review-requested
team/logs-integrations-reviewers

In this refactoring a collector knows in which bucket of the parent their data is in. This allows to convert the previous approach of one collector per bucket to one...