Restore use of v7 index versions in snapshot tests (#119133)

Versions v7 have been filtered out when we bumped to v9, but that was not necessary.
Actually, given we decided to keep on supporting v7 indices, it is important to
restore such tests.

Author: javanna

server/src/internalClusterTest/java/org/elasticsearch/repositories/IndexSnapshotsServiceIT.java

@@ -19,7 +19,6 @@
 import org.elasticsearch.cluster.metadata.IndexMetadata;
 import org.elasticsearch.common.util.CollectionUtils;
 import org.elasticsearch.core.Strings;
-import org.elasticsearch.core.UpdateForV9;
 import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexVersion;
 import org.elasticsearch.index.IndexVersions;
@@ -109,16 +108,14 @@ public void testGetShardSnapshotOnEmptyRepositoriesListThrowsAnError() {
         expectThrows(IllegalArgumentException.class, () -> getLatestSnapshotForShardFuture(Collections.emptyList(), "idx", 0, false));
     }
 
-    @UpdateForV9(owner = UpdateForV9.Owner.DISTRIBUTED_COORDINATION)
-    // below we were selecting an index version between current and 7.5.0, this has been updated to 8.0.0 now but that might need to change
     public void testGetShardSnapshotReturnsTheLatestSuccessfulSnapshot() throws Exception {
         final String repoName = "repo-name";
         final Path repoPath = randomRepoPath();
         createRepository(repoName, FsRepository.TYPE, repoPath);
 
         final boolean useBwCFormat = randomBoolean();
         if (useBwCFormat) {
-            final IndexVersion version = randomVersionBetween(random(), IndexVersions.MINIMUM_COMPATIBLE, IndexVersion.current());
+            final IndexVersion version = randomVersionBetween(random(), IndexVersions.V_7_5_0, IndexVersion.current());
             initWithSnapshotVersion(repoName, repoPath, version);
         }
 

test/framework/src/main/java/org/elasticsearch/snapshots/AbstractSnapshotIntegTestCase.java

@@ -34,7 +34,6 @@
 import org.elasticsearch.common.unit.ByteSizeUnit;
 import org.elasticsearch.common.util.concurrent.EsExecutors;
 import org.elasticsearch.core.Nullable;
-import org.elasticsearch.core.UpdateForV9;
 import org.elasticsearch.index.IndexVersion;
 import org.elasticsearch.index.IndexVersions;
 import org.elasticsearch.plugins.Plugin;
@@ -367,14 +366,12 @@ protected static Settings.Builder indexSettingsNoReplicas(int shards) {
     /**
      * Randomly write an empty snapshot of an older version to an empty repository to simulate an older repository metadata format.
      */
-    @UpdateForV9(owner = UpdateForV9.Owner.DISTRIBUTED_COORDINATION)
-    // This used to pick an index version from 7.0.0 to 8.9.0. The minimum now is 8.0.0 but it's not clear what the upper range should be
     protected void maybeInitWithOldSnapshotVersion(String repoName, Path repoPath) throws Exception {
         if (randomBoolean() && randomBoolean()) {
             initWithSnapshotVersion(
                 repoName,
                 repoPath,
-                IndexVersionUtils.randomVersionBetween(random(), IndexVersions.MINIMUM_COMPATIBLE, IndexVersions.V_8_9_0)
+                IndexVersionUtils.randomVersionBetween(random(), IndexVersions.V_7_0_0, IndexVersions.V_8_9_0)
             );
         }
     }