### CI Link

https://gradle-enterprise.elastic.co/s/ou2sap2dhy3q2/tests/:server:internalClusterTest/org.elasticsearch.snapshots.SharedClusterSnapshotRestoreIT/testDataFileFailureDuringSnapshot

### Repro line

./gradlew ':server:internalClusterTest' --tests "org.elasticsearch.snapshots.SharedClusterSnapshotRestoreIT.testDataFileFailureDuringSnapshot" -Dtests.seed=37B64CEE1DCEACEB -Dtests.locale=uk -Dtests.timezone=Africa/Lusaka -Druntime.java=17

### Does it reproduce?

Yes

### Applicable branches

main

### Failure history

_No response_

### Failure excerpt

```
java.lang.Exception: Test abandoned because suite timeout was reached. 
    at __randomizedtesting.SeedInfo.seed([37B64CEE1DCEACEB]:0)
```
server/src/main/java/org/elasticsearch/repositories/blobstore/BlobStoreRepository.java
public ClusterState execute(ClusterState State) {
                final RepositoryMetadata meta = getRepoMetadata(State);
                final String repoName = metadata.name();
                final long genInState = meta.generation();
                final boolean uninitializedMeta = meta.generation() == RepositoryData.UNKNOWN_REPO_GEN || bestEftConsistency;
                if (uninitializedMeta == false && meta.pendingGeneration() != genInState) {
                    logger.info(
                        "Trying to write new  over unfinished write, repo [{}] is at "
                            + "safe generation [{}] and pending generation [{}]",
                        meta.name(),
                        genInState,
                        meta.pendingGeneration()
                    );
                }
                assert expectedGen == RepositoryData.EMPTY_REPO_GEN || uninitializedMeta || expectedGen == meta.generation()
                    : "Expected non-empty generation [" + expectedGen + "] does not match generation tracked in [" + meta + "]";
                // 
                // 
                final long safeGeneration = expectedGen == RepositoryData.EMPTY_REPO_GEN
                    ? RepositoryData.EMPTY_REPO_GEN
                    : (uninitializedMeta ? expectedGen : genInState);
                // 
                // 
                // 
                // 
                final long nextPendingGen = metadata.pendingGeneration() + 1;
                newGen = uninitializedMeta ? Math.max(expectedGen + 1, nextPendingGen) : nextPendingGen;
                assert newGen > latestKnownRepoGen.get()
                    : "Attempted new generation ["
                        + newGen