EQL: [Tests] Use snapshot from 7.10

To be able to run the tests from 7.10 onwards use a snapshot created
with 7.10.

Follows: #63644

Author: matriv

x-pack/plugin/eql/qa/correctness/src/javaRestTest/resources/config.properties

@@ -8,7 +8,7 @@ index_name=mitre
 fetch_size=1000
 size=2000
 gcs_repo_name=eql_correctness_gcs_repo
-gcs_snapshot_name=mitre-snapshot
+gcs_snapshot_name=mitre-snapshot_7.10
 gcs_bucket_name=matriv-gcs
 gcs_base_path=mitre-data
 gcs_client_name=eql_test