S3/Azure IT should use ESBlobStoreRepositoryIntegTestCase

[dadoonet]

As we now have #14050, we can try use it for Azure and S3 Integration tests as well.

See for example: https://github.com/elastic/elasticsearch/blob/master/plugins/repository-s3/src/test/java/org/elasticsearch/repositories/s3/AbstractS3SnapshotRestoreTest.java

• Azure. See Fix azure files removal #18451
• S3