chore(l1, l2): remove rocksdb wal TTL (#4966)

**Motivation**

We currently have a 1 hour ttl for our rocksdb WAL for no discernible
reason, and I think it's better to leave it to rocksdb to configure
until we find a reason to change it.

This 1 hour ttl is the main reason why the database size for our nodes
drops massively an hour after snap sync finishes (in mainnet this drop
is of more than 100 GB)

**Description**

<!-- A clear and concise general description of the changes this PR
introduces -->

<!-- Link to issues: Resolves #111, Resolves #222 -->

Closes #issue_number

Author: jrchatruc

crates/storage/store_db/rocksdb.rs

@@ -153,7 +153,6 @@ impl Store {
 
         db_options.set_wal_recovery_mode(rocksdb::DBRecoveryMode::PointInTime);
         db_options.set_max_total_wal_size(2 * 1024 * 1024 * 1024); // 2GB
-        db_options.set_wal_ttl_seconds(3600);
         db_options.set_wal_bytes_per_sync(32 * 1024 * 1024); // 32MB
         db_options.set_bytes_per_sync(32 * 1024 * 1024); // 32MB
         db_options.set_use_fsync(false); // fdatasync