[Security Solution] Add additional privileges to Kibana System role for .endpoint-scripts-file* indexes

[paul-tavares]

Description

• Adds delete + manage privileges to the Kibana System role for .endpoint-scripts-file set of indexes
  • a follow up to [Security Solution] Add privileges to Kibana System role for management of internal indexes in support of Elastic Defend features #138993
  • Should address the followign error seen in kibana when deleting a document: security_exception: action [indices:admin/refresh] is unauthorized for user [kibana_system] with effective roles [kibana_system] on indices [.endpoint-script-file-data-default], this action is granted by the index privileges [maintenance,manage,all]

[elasticsearchmachine]

Pinging @elastic/es-security (Team:Security)

[elasticsearchmachine]

Hi @paul-tavares, I've created a changelog YAML for you.