ci(benchmarks): remove verbose output and post is inferred (#15073) (#…

…15079)

(cherry picked from commit 1138503)

Co-authored-by: Victor Martinez <victormartinezrubio@gmail.com>

.ci/scripts/download-png-from-kibana.sh

@@ -35,7 +35,7 @@ JOB_PARAMS=$(echo "
 " | tr -d "[:space:]")
 
 
-png_url_path=$(curl -XPOST -v -L -u "$kibana_user:$kibana_pwd" -H 'kbn-xsrf: true' --data-urlencode "jobParams=${JOB_PARAMS}" $kibana_host/api/reporting/generate/pngV2 | jq -r '.path')
+png_url_path=$(curl -L -u "$kibana_user:$kibana_pwd" -H 'kbn-xsrf: true' --data-urlencode "jobParams=${JOB_PARAMS}" $kibana_host/api/reporting/generate/pngV2 | jq -r '.path')
 
 if [[ "$png_url_path" == "null" ]]
 then