textproc/apache-solr: disable format lookup for log4j

As recommended here:
https://solr.apache.org/news.html#apache-solr-affected-by-apache-log4j-cve-2021-44228
disable lookup that opens a security vulnerability with log4j < 2.15.0.
This is a mitigation for CVE-2021-44228.

PR: 260373