Add table gcp_compute_disk_metric_write_ops_hourly. Closes #269

[rajeshbal65]

Integration test logs

Logs

Add passing integration test logs here

Example query results

Results

### Basic info

```sql
select
  name,
  minimum,
  maximum,
  average,
  sample_count
from
  gcp_compute_disk_metric_write_ops_hourly
order by
  name;

+--------+---------+---------+---------+--------------+
| name   | minimum | maximum | average | sample_count |
+--------+---------+---------+---------+--------------+
| disk-1 | 0       | 0       | 0       | 60           |
| disk-1 | 0       | 0       | 0       | 60           |
| disk-1 | 0       | 0       | 0       | 60           |
| disk-1 | 0       | 0       | 0       | 60           |
| disk-1 | 0       | 0       | 0       | 60           |
| disk-1 | 0       | 0       | 0       | 60           |
| disk-1 | 0       | 0       | 0       | 60           |
| disk-1 | 0       | 0       | 0       | 35           |
+--------+---------+---------+---------+--------------+

Intervals averaging over 100 write ops

select
  name,
  round(minimum::numeric,2) as min_write_ops,
  round(maximum::numeric,2) as max_write_ops,
  round(average::numeric,2) as avg_write_ops,
  sample_count
from
  gcp_compute_disk_metric_write_ops_hourly
where average > 10
order by
  name;

+------------+---------------+---------------+---------------+--------------+
| name       | min_write_ops | max_write_ops | avg_write_ops | sample_count |
+------------+---------------+---------------+---------------+--------------+
| instance-1 | 0.00          | 185.00        | 17.56         | 18           |
| instance-1 | 0.00          | 227.00        | 16.78         | 60           |
+------------+---------------+---------------+---------------+--------------+

</details>

[rajlearner17]

LGTM