Update usage types in the docs

[sureshanaparti]

This PR updates/sync the usage types in docs with the API response and code.

Fixes apache/cloudstack#10813

Current doc: https://docs.cloudstack.apache.org/en/latest/adminguide/usage.html#usage-types.

list usagetypes API response =>

(usageenv) 🐱 > list usagetypes 
{
  "count": 25,
  "usagetype": [
    {
      "description": "Running Vm Usage",
      "usagetypeid": 1
    },
    {
      "description": "Allocated Vm Usage",
      "usagetypeid": 2
    },
    {
      "description": "IP Address Usage",
      "usagetypeid": 3
    },
    {
      "description": "Network Usage (Bytes Sent)",
      "usagetypeid": 4
    },
    {
      "description": "Network Usage (Bytes Received)",
      "usagetypeid": 5
    },
    {
      "description": "Volume Usage",
      "usagetypeid": 6
    },
    {
      "description": "Template Usage",
      "usagetypeid": 7
    },
    {
      "description": "ISO Usage",
      "usagetypeid": 8
    },
    {
      "description": "Snapshot Usage",
      "usagetypeid": 9
    },
    {
      "description": "Security Group Usage",
      "usagetypeid": 10
    },
    {
      "description": "Load Balancer Usage",
      "usagetypeid": 11
    },
    {
      "description": "Port Forwarding Usage",
      "usagetypeid": 12
    },
    {
      "description": "Network Offering Usage",
      "usagetypeid": 13
    },
    {
      "description": "VPN users usage",
      "usagetypeid": 14
    },
    {
      "description": "VM Disk usage(I/O Read)",
      "usagetypeid": 21
    },
    {
      "description": "VM Disk usage(I/O Write)",
      "usagetypeid": 22
    },
    {
      "description": "VM Disk usage(Bytes Read)",
      "usagetypeid": 23
    },
    {
      "description": "VM Disk usage(Bytes Write)",
      "usagetypeid": 24
    },
    {
      "description": "VM Snapshot storage usage",
      "usagetypeid": 25
    },
    {
      "description": "Volume on secondary storage usage",
      "usagetypeid": 26
    },
    {
      "description": "VM Snapshot on primary storage usage",
      "usagetypeid": 27
    },
    {
      "description": "Backup storage usage",
      "usagetypeid": 28
    },
    {
      "description": "Bucket storage usage",
      "usagetypeid": 29
    },
    {
      "description": "Network usage",
      "usagetypeid": 30
    },
    {
      "description": "VPC usage",
      "usagetypeid": 31
    }
  ]
}
(usageenv) 🐱 > 

code =>

https://github.com/apache/cloudstack/blob/39c5641cbe674b19bc77082b850565f634a7cb84/api/src/main/java/org/apache/cloudstack/usage/UsageTypes.java#L24-L50

---

📚 Documentation preview 📚: https://cloudstack-documentation--504.org.readthedocs.build/en/504/

[sureshanaparti]

@blueorangutan docbuild

[blueorangutan]

@sureshanaparti a Jenkins job has been kicked to build the document. I'll keep you posted as I make progress.

[blueorangutan]

QA-Doc build preview: https://qa.cloudstack.cloud/builds/docs-build/pr/504. (QA-JID 339)

[sureshanaparti]

@rajujith Update the usage types (still the record formats for these to be updated)