Unmute HttpExporterTests after recent entitlement test fixes (elastic#131080)

Closes elastic#130600 Closes elastic#130599

Author: mosche

muted-tests.yml

@@ -519,12 +519,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.action.EsqlActionBreakerIT
   method: testTopNPushedToLucene
   issue: https://github.com/elastic/elasticsearch/issues/130505
-- class: org.elasticsearch.xpack.monitoring.exporter.http.HttpExporterTests
-  method: testExporterWithHostOnly
-  issue: https://github.com/elastic/elasticsearch/issues/130599
-- class: org.elasticsearch.xpack.monitoring.exporter.http.HttpExporterTests
-  method: testCreateRestClient
-  issue: https://github.com/elastic/elasticsearch/issues/130600
 - class: org.elasticsearch.xpack.esql.qa.multi_node.EsqlSpecIT
   method: test {match-operator.MatchWithMoreComplexDisjunctionAndConjunction SYNC}
   issue: https://github.com/elastic/elasticsearch/issues/130640