[8.18] Deletes Detections APIs (backport #6872) (#6887)

* Deletes Detections APIs (#6872)

* Deletes Detections APIs

* update references

* update reference

* revert 8.8 URLs

* Adds chapter tag

(cherry picked from commit f273f0c)

* move file to deleted-pages

* change contents

* moves file back

* add include

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Co-authored-by: natasha-moore-elastic <[email protected]>
Co-authored-by: natasha-moore-elastic <[email protected]>

Author: mergify[bot]