[CLI] operator update should be suggested only if an installation is detected

Updating the ops cli using 'ops -update` always reports that a newer version of the operator is available and that it can be updated using a specific tasks, e.g.

`Welcome to ops! Setting up...
Cloning tasks...
Enumerating objects: 3661, done.
Counting objects: 100% (289/289), done.
Compressing objects: 100% (110/110), done.
Total 3661 (delta 164), reused 271 (delta 158), pack-reused 3372
Tasks downloaded successfully

New operator version detected!
Current deployed operator can be updated with: ops update operator`

We should change the behaviour to trigger this check only if an active installation is detected

从 `ops -update` 的 CLI 入口点开始，跟踪报告有更新版本 operator 的检查。分别在有活动的 operator 安装和没有活动的 operator 安装时重现该命令。仅当检测到活动安装时才显示更新建议，即表示完成。

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