Links solved bugs to class cast exception changelog and unmutes errors (#139340)

Author: ncordon

docs/changelog/137511.yaml

@@ -2,4 +2,6 @@ pr: 137511
 summary: Fixes esql class cast bug in STATS at planning level
 area: ES|QL
 type: bug
-issues: []
+issues:
+  - 133992
+  - 136598

x-pack/plugin/esql/qa/server/src/main/java/org/elasticsearch/xpack/esql/qa/rest/generative/GenerativeRestTest.java

@@ -68,9 +68,7 @@ public abstract class GenerativeRestTest extends ESRestTestCase implements Query
         "The incoming YAML document exceeds the limit:", // still to investigate, but it seems to be specific to the test framework
         "Data too large", // Circuit breaker exceptions eg. https://github.com/elastic/elasticsearch/issues/130072
         "long overflow", // https://github.com/elastic/elasticsearch/issues/135759
-        "cannot be cast to class", // https://github.com/elastic/elasticsearch/issues/133992
         "can't find input for", // https://github.com/elastic/elasticsearch/issues/136596
-        "unexpected byte", // https://github.com/elastic/elasticsearch/issues/136598
         "out of bounds for length", // https://github.com/elastic/elasticsearch/issues/136851
         "optimized incorrectly due to missing references", // https://github.com/elastic/elasticsearch/issues/138231
         "Potential cycle detected", // https://github.com/elastic/elasticsearch/issues/138346