listUsageRecords to return the physical size of VM snapshots on primary storage

##### ISSUE TYPE

* Improvement Request

##### COMPONENT NAME

~~~
API, Usage
~~~

##### CLOUDSTACK VERSION

~~~
4.18.1
~~~

##### CONFIGURATION

VM snapshots , VMware
##### OS / ENVIRONMENT

##### SUMMARY

Currently cloudstack usage only returns the virtual size of the VM snapshot on primary storage i.e usage type 27. It would be useful to get the physical size as well in the API response.

```

cmk list usagerecords startdate=2023-12-06 09:00:00 type=27 enddate=2023-12-06 09:59:59

--
{
"account": "admin",
"accountid": "570917c5-8ddb-11ee-a6eb-1e002e000c9f",
"description": "VMSnapshot on primary storage usage Id: 0333f93b-fd60-42ad-a961-49b75df4313f for VM Rocky-2 (9058215a-d674-468d-ac61-449bd0593448) with size (50.00 GB) 53687091200",
"domain": "ROOT",
"domainid": "376e4be1-8ddb-11ee-a6eb-1e002e000c9f",
"enddate": "2023-12-06'T'09:59:59+00:00",
"name": "rocky-snapshot3",
"rawusage": "1",
"size": 53687091200,
"startdate": "2023-12-06'T'09:00:00+00:00",
"tags": [],
"usage": "1 Hrs",
"usageid": "0333f93b-fd60-42ad-a961-49b75df4313f",
"usagetype": 27,
"virtualmachineid": "9058215a-d674-468d-ac61-449bd0593448",
"zoneid": "771aecba-b1ef-4bfc-94e6-b325aa2a4c01"
},
--
{
"account": "admin",
"accountid": "570917c5-8ddb-11ee-a6eb-1e002e000c9f",
"description": "VMSnapshot on primary storage usage Id: 591a15ab-b0d0-465c-a30f-fe9c0785da88 for VM Rocky-2 (9058215a-d674-468d-ac61-449bd0593448) with size (50.00 GB) 53687091200",
"domain": "ROOT",
"domainid": "376e4be1-8ddb-11ee-a6eb-1e002e000c9f",
"enddate": "2023-12-06'T'09:59:59+00:00",
"name": "rocky-snapshot1",
"rawusage": "1",
"size": 53687091200,
"startdate": "2023-12-06'T'09:00:00+00:00",
"tags": [],
"usage": "1 Hrs",
"usageid": "591a15ab-b0d0-465c-a30f-fe9c0785da88",
"usagetype": 27,
"virtualmachineid": "9058215a-d674-468d-ac61-449bd0593448",
"zoneid": "771aecba-b1ef-4bfc-94e6-b325aa2a4c01"
},
{
"account": "admin",
"accountid": "570917c5-8ddb-11ee-a6eb-1e002e000c9f",
"description": "VMSnapshot on primary storage usage Id: e82b68a2-5e63-4509-9be0-48aedd822529 for VM Rocky-2 (9058215a-d674-468d-ac61-449bd0593448) with size (50.00 GB) 53687091200",
"domain": "ROOT",
"domainid": "376e4be1-8ddb-11ee-a6eb-1e002e000c9f",
"enddate": "2023-12-06'T'09:59:59+00:00",
"name": "rocky-snapshot2",
"rawusage": "1",
"size": 53687091200,
"startdate": "2023-12-06'T'09:00:00+00:00",
"tags": [],
"usage": "1 Hrs",
"usageid": "e82b68a2-5e63-4509-9be0-48aedd822529",
"usagetype": 27,
"virtualmachineid": "9058215a-d674-468d-ac61-449bd0593448",
"zoneid": "771aecba-b1ef-4bfc-94e6-b325aa2a4c01"
},

mysql> select id,usage_display,usage_type,format_bytes(size) as size,format_bytes(virtual_size) as virtual_size,start_date,end_date from cloud_usage.cloud_usage where usage_type=27 and vm_instance_id=2782 and start_date='2023-12-06 09:00:00';
+------+---------------+------------+-----------+--------------+---------------------+---------------------+
| id | usage_display | usage_type | size | virtual_size | start_date | end_date |
+------+---------------+------------+-----------+--------------+---------------------+---------------------+
| 9709 | 1 Hrs | 27 | 24.61 GiB | 50.00 GiB | 2023-12-06 09:00:00 | 2023-12-06 09:59:59 |
| 9713 | 1 Hrs | 27 | 50.00 GiB | 50.00 GiB | 2023-12-06 09:00:00 | 2023-12-06 09:59:59 |
| 9714 | 1 Hrs | 27 | 24.61 GiB | 50.00 GiB | 2023-12-06 09:00:00 | 2023-12-06 09:59:59 |
+------+---------------+------------+-----------+--------------+---------------------+---------------------+
```

usage type 27 に対する listUsageRecords API の処理から始め、レスポンスをレポートに表示される cloud_usage 列および virtual_size 列と比較します。VMware のプライマリストレージで VM スナップショットの使用量がどのように設定されるかを追跡します。完了条件は、API がこれらの使用量レコードについて物理サイズと仮想サイズの両方を公開することです。

索引モデルが issue の本文から書いたものです。