Move static block to class level in cosmos-encryption TestSuiteBase (#47216)

* Initial plan

* Move CosmosNettyLeakDetectorFactory.ingestIntoNetty() to class-level static block

Co-authored-by: FabianMeiswinkel <19165014+FabianMeiswinkel@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: FabianMeiswinkel <19165014+FabianMeiswinkel@users.noreply.github.com>

Author: Copilot

sdk/cosmos/azure-cosmos-encryption/src/test/java/com/azure/cosmos/encryption/TestSuiteBase.java

@@ -170,6 +170,7 @@ protected static CosmosAsyncContainer getSharedSinglePartitionCosmosContainer(Co
     }
 
     static {
+        CosmosNettyLeakDetectorFactory.ingestIntoNetty();
         accountConsistency = parseConsistency(TestConfigurations.CONSISTENCY);
         desiredConsistencies = immutableListOrNull(
             ObjectUtils.defaultIfNull(parseDesiredConsistencies(TestConfigurations.DESIRED_CONSISTENCIES),
@@ -1482,9 +1483,4 @@ protected static void validateResponse(EncryptionPojo originalItem, EncryptionPo
             assertThat(result.getSensitiveChildPojo2DArray()[0][0].getSensitiveStringArray()).isEqualTo(originalItem.getSensitiveChildPojo2DArray()[0][0].getSensitiveStringArray());
             assertThat(result.getSensitiveChildPojo2DArray()[0][0].getSensitiveString3DArray()).isEqualTo(originalItem.getSensitiveChildPojo2DArray()[0][0].getSensitiveString3DArray());
         }
-
-
-        static {
-            CosmosNettyLeakDetectorFactory.ingestIntoNetty();
-        }
     }