Support new api/rules/search API

[pavel-mikula-sonarsource]

Currently, the API returns structure like this (simplified)

{
    "total": 429,
    "p": 1,
    "ps": 500,
    "rules": [
    ],
    "actives": {
    },
    "qProfiles": {
    },
    "paging": {
        "pageIndex": 1,
        "pageSize": 500,
        "total": 429
    }
}

Properties total, p and ps are deprecated since SQ 9.8 and will be removed in 10.x SQ series. The result will look like this (simplified)

{
    "rules": [
    ],
    "actives": {
    },
    "qProfiles": {
    },
    "paging": {
        "pageIndex": 1,
        "pageSize": 500,
        "total": 435
    }
}

We use total and ps in SonarWebServer class and DownloadRules method.

We need to:

• Use new paging element for SQ 10.x
• Use the old total and ps for SC and older SQs

SQ ticket: https://sonarsource.atlassian.net/browse/SONAR-19233