crowdstrike: Add `allow_deprecated_use` flag to FDR logfile input

[kcreddy]

logfile input is deprecated and disabled in favor of filestream input.
#12503 added allow_deprecated_use: true flag to all logfile input templates to continue allowing the logfile input, but crowdstrike.fdr data stream was missed in this change.

Without this flag, the ingestion still happens because the original deprecation isn't valid for Elastic Agent based integrations. But to make crowdstrike.fdr data stream consistent with other logfile based input templates, we need to add this flag to stream.yml.hbs. This also allows that the ingestion isn't temporarily broken if deprecation is made valid for Elastic Agent integrations.

This issue is only valid until logfile to filestream migration is done: #16141

[elasticmachine]

Pinging @elastic/security-service-integrations (Team:Security-Service Integrations)