Previously, we configured embedded Tomcat in such a way that no TLD
scan patterns were configured. This differed from a standalone
Tomcat installation where 4 patterns are configured that take
precedence over some of the skip patterns. The missing scan patterns
resulted in the skip patterns preventing the discovery of Log4j2's
TLDs.

This commit updates TomcatServletWebServerFactory to configure the
same four scan patterns as standalone Tomcat configures by default.

Fixes gh-23302