fix(c-s_lwt_big_data_multidc): Adjust c-s_lwt_big_data_multidc.yaml to collect enough data for validation
fix(c-s_lwt_big_data_multidc): Adjust c-s_lwt_big_data_multidc.yaml to collect enough data for validation

1. for 2_column_update view - there is so small amount of rows for this view, so during update
chance to update them is very small, and they are not updated.

2. for immutable view - also lack of data.

This commit fixes those problems

scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests