API for system/version to display CE and EE

[WaysonWei]

Description:

Upon running GET system/version, we do not display CE nor EE:

vagrant@docker:~$ http --verify=no --form GET https://192.168.2.12:9443/api/system/version X-API-Key:ptr_2ac9jq8EA+GkHPb4Bio0jJeU8oto3Mm++s8awZXBjzo= 
HTTP/1.1 200 OK
Content-Length: 258
Content-Type: application/json
Date: Fri, 05 May 2023 20:20:03 GMT
X-Content-Type-Options: nosniff
X-Xss-Protection: 1; mode=block

{
    "Build": {
        "BuildNumber": "30141",
        "GoVersion": "1.19.4",
        "ImageTag": "linux-amd64-2.18.2",
        "NodejsVersion": "18.16.0",
        "WebpackVersion": "5.65.0",
        "YarnVersion": "1.22.19"
    },
    "DatabaseVersion": "2.18.2",
    "LatestVersion": "",
    "ServerVersion": "2.18.2",
    "UpdateAvailable": false
}

Expected Behavior:

Display EE or CE in a new field

(including updating Swagger docs)