[DOC] New file option for Clear Index Cache API

[kotwanikunal]

What do you want to do?

• Request a change to existing documentation
• Add new documentation
• Report a technical problem with the documentation
• Other

Tell us about your request. Provide a summary of the request and all versions that are affected.
A new option to clear filecache was added to the existing clear indices cache API (https://opensearch.org/docs/latest/api-reference/index-apis/clear-index-cache/)

Parameter: file
Type: Boolean
Description: If true, clears the unused entries from the filecache on search capable nodes. Defaults to false.

Sample Request:
POST http://localhost:9200/*/_cache/clear?file=true

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.

• Add filecache support in clear indices cache API OpenSearch#7498

[Naarcha-AWS]

Add the new parameter to this section: https://opensearch.org/docs/latest/api-reference/index-apis/clear-index-cache/#path-parameters