CASSANDRA-16763: Updated license check and gitignore

* Added documentation files to RAT exclude list:
    - doc/antora.yaml
    - doc/modules/*
* Added generated doc files to .gitignore:
    - doc/modules/cassandra/pages/configuration/cass_yaml_file.adoc
    - doc/modules/cassandra/pages/tools/nodetool/
    - doc/modules/cassandra/examples/TEXT/NODETOOL/

Patch by Anthony Grasso; reviewed by Michael Semb Wever for CASSANDRA-16763

.build/build-rat.xml

@@ -53,6 +53,7 @@
                  <exclude name="**/cassandra.yaml"/>
                  <exclude name="**/cassandra-murmur.yaml"/>
                  <exclude name="**/cassandra-seeds.yaml"/>
+                 <exclude NAME="**/doc/antora.yml"/>
                  <exclude name="**/test/conf/cassandra.yaml"/>
                  <exclude name="**/test/conf/cassandra_encryption.yaml"/>
                  <exclude name="**/test/conf/cdc.yaml"/>
@@ -67,6 +68,8 @@
                  <exclude name="**/tools/cqlstress-example.yaml"/>
                  <exclude name="**/tools/cqlstress-insanity-example.yaml"/>
                  <exclude name="**/tools/cqlstress-lwt-example.yaml"/>
+                 <!-- Documentation files -->
+                 <exclude NAME="**/doc/modules/**/*"/>
                  <!-- NOTICE files -->
                  <exclude NAME="**/NOTICE.md"/>
                  <!-- LICENSE files -->

.gitignore

@@ -68,7 +68,9 @@ Thumbs.db
 .ant_targets
 
 # Generated files from the documentation
-doc/source/configuration/cassandra_config_file.rst
+doc/modules/cassandra/pages/configuration/cass_yaml_file.adoc
+doc/modules/cassandra/pages/tools/nodetool/
+doc/modules/cassandra/examples/TEXT/NODETOOL/
 
 # Python virtual environment
 venv/