Add metadata.profiles to Network Activity SYSCALL test expectation

The schema-processor emits ocsf.metadata.profiles: [host] when the host
profile is declared on the schema. Mirror the format used by IAM
sub-pipeline tests (e.g. line 141).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: nbeckstead-ddog

linux_audit_logs/assets/logs/linux-audit-logs_tests.yaml

@@ -1636,6 +1636,8 @@ tests:
           product:
             name: "Auditd"
             vendor_name: "Linux"
+          profiles:
+           - "host"
           version: "1.5.0"
         severity: "Informational"
         severity_id: 1