Unmute FieldExtractorIT (elastic#117669)

Fixed in elastic#117529

Closes elastic#117524 Closes elastic#117531

Author: dnhatn

muted-tests.yml

@@ -214,14 +214,8 @@ tests:
 - class: org.elasticsearch.xpack.test.rest.XPackRestIT
   method: test {p0=transform/transforms_reset/Test reset running transform}
   issue: https://github.com/elastic/elasticsearch/issues/117473
-- class: org.elasticsearch.xpack.esql.qa.multi_node.FieldExtractorIT
-  method: testConstantKeywordField
-  issue: https://github.com/elastic/elasticsearch/issues/117524
 - class: org.elasticsearch.repositories.s3.RepositoryS3EcsClientYamlTestSuiteIT
   issue: https://github.com/elastic/elasticsearch/issues/117525
-- class: org.elasticsearch.xpack.esql.qa.mixed.FieldExtractorIT
-  method: testConstantKeywordField
-  issue: https://github.com/elastic/elasticsearch/issues/117531
 - class: org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT
   method: test {p0=synonyms/90_synonyms_reloading_for_synset/Reload analyzers for specific synonym set}
   issue: https://github.com/elastic/elasticsearch/issues/116777