Add bomr exclusion for Apache Solr 8.6+

Closes gh-23370

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -1518,6 +1518,9 @@ bom {
 		}
 	}
 	library("Solr", "8.5.2") {
+		prohibit("[8.6.0,8.7.0)") {
+			because "it uses a library that is not available on Maven Central"
+		}
 		group("org.apache.solr") {
 			modules = [
 				"solr-analysis-extras",