sniHostCheck should default to SOLR_SSL_CHECK_PEER_NAME

When we upgraded Solr to Jetty 10, it started doing SNI checks by default. To combat this, Tomas added an option to skip SNI Host checking in SOLR-16735. I think that this should default to the option already given in SOLR_SSL_CHECK_PEER_NAME, which is practically the same check for clients. (SNI is a server setting).

So if we start to set solr.jetty.ssl.sniHostCheck by default to the value that SOLR_SSL_CHECK_PEER_NAME has, then users will see no issues when using Solr as they had been. If users want to separate their server/client settings. They can always still provide the solr.jetty.ssl.sniHostCheck option themselves in SOLR_OPTS, which will override the option defaulted by Solr.