fix(longevity-large-partition-8h): chanage run_full_partition_scan.in…

…terval

make `run_full_partition_scan.interval` 2 minutes, insted two 2sec
to avoid overloading scylla during this use case

Ref: scylladb#4960

test-cases/longevity/longevity-large-partition-8h.yaml

@@ -48,4 +48,4 @@ user_prefix: 'longevity-large-partitions-8h'
 
 space_node_threshold: 644245094
 
-run_full_partition_scan: '{"ks_cf": "scylla_bench.test", "interval": 2, "pk_name":"pk", "rows_count": 5555, "validate_data": "true"}' # 'ks.cf, interval(sec), partition-key name, number-of-rows-per-partition, validate reversed query output, include data-column or only validate pk + ck'
+run_full_partition_scan: '{"ks_cf": "scylla_bench.test", "interval": 120, "pk_name":"pk", "rows_count": 5555, "validate_data": "true"}' # 'ks.cf, interval(sec), partition-key name, number-of-rows-per-partition, validate reversed query output, include data-column or only validate pk + ck'