Address reviews:

- added comments to some of the csv-spec tests
- de-Ignored few csv-spec tests
- renamed (removed the white spaces) csv-spec tests
- more tests

Author: astefan

muted-tests.yml

@@ -532,7 +532,7 @@ tests:
   method: testInferClassificationModel
   issue: https://github.com/elastic/elasticsearch/issues/133448
 - class: org.elasticsearch.xpack.esql.qa.single_node.GenerativeForkIT
-  method: test {csv-spec:inlinestats.MultiIndexInlinestats OfMultiTypedField}
+  method: test {csv-spec:inlinestats.MultiIndexInlinestatsOfMultiTypedField}
   issue: https://github.com/elastic/elasticsearch/issues/133973
 
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