Add gpu stats endpoint for internal monitoring

[Redm4x]

Added 2 api endpoints for internal monitoring (#106)

https://api.cloudmos.io/internal/gpu

Returns a summary of the gpus on the network.

Example Response

{
  "gpus": {
    "total": {
      "allocatable": 2,
      "allocated": 0
    },
    "details": {
      "nvidia": [
        {
          "model": "t4",
          "ram": "16Gi",
          "interface": "PCIe",
          "allocatable": 1,
          "allocated": 0
        },
        {
          "model": "rtx3060ti",
          "ram": "8Gi",
          "interface": "PCIe",
          "allocatable": 1,
          "allocated": 0
        }
      ]
    }
  }
}

Query parameters for filtering

---

Param	Description
provider	Either a provider address (ex: akash175llqyjvxfle9qwt740vm46772dzaznpzgm576) or a host uri (ex: https://provider.akashprovid.com:8443)
vendor	Ex: nvidia
model	Ex: t4
memory_size	Ex: 16Gi

All query parameters can be combined, ex:
https://api.cloudmos.io/internal/gpu?provider=akash175llqyjvxfle9qwt740vm46772dzaznpzgm576&vendor=nvidia&model=rtx3060ti&memory_size=8Gi

https://api.cloudmos.io/internal/provider-versions

Returns a list of versions and the providers that are currently on that version. The <UNKNOWN> version correspond to providers where the version could not be determined. The /version endpoint was broken for a long time, but is now fixed in v0.5.0-rc11

Example Response

{
  "0.5.0-rc16": {
    "version": "0.5.0-rc16",
    "count": 4,
    "ratio": 0.05,
    "providers": [
      "https://provider.moonbys.cloud:8443",
      "https://provider.akashprovid.com:8443",
      "https://provider.akashtesting.xyz:8443"
    ]
  },
  "0.5.0-rc15": {
    "version": "0.5.0-rc16",
    "count": 4,
    "ratio": 0.05,
    "providers": [
      "https://provider.akash.pro:8443"
    ]
  },
  "<UNKNOWN>": {
    "version": "<UNKNOWN>",
    "count": 80,
    "ratio": 0.95,
    "providers": [
      "https://provider.macptrading.com:8443",
      "https://provider.digitaler-friedhof.com:8443",
      "https://provider.qioi.io:8443",
      "https://provider.bluepeer.io:8443",
      ...
    ]
  }
}