Mute org.elasticsearch.upgrades.ApiKeyBackwardsCompatibilityIT testCreatingAndUpdatingApiKeys elastic#125307

Author: elasticsearchmachine

muted-tests.yml

@@ -483,3 +483,6 @@ tests:
 - class: org.elasticsearch.xpack.inference.external.request.azureopenai.embeddings.AzureOpenAiEmbeddingsRequestTests
   method: testCreateRequest_WithEntraIdDefined
   issue: https://github.com/elastic/elasticsearch/issues/125061
+- class: org.elasticsearch.upgrades.ApiKeyBackwardsCompatibilityIT
+  method: testCreatingAndUpdatingApiKeys
+  issue: https://github.com/elastic/elasticsearch/issues/125307