pipeline:update: Support changing the Code Location

**Is your feature request related to a problem? Please describe.**
We are using the CM CLI tool extensively to manage our Web Tier Config pipelines and executions. Unfortunately, not all options available in the CM UI are available in the CLI and this is causing a lot of troubles.

**Describe the solution you'd like**
Please add new option for `cloudmanager:pipeline:update`, with the same functionality as the "Code Location" input field available in the UI. It might be called `--codeLocation` and it should work when the pipeline is a Web Tier Config pipeline. If the pipeline is not a Web Tier Config pipeline, the usage of this option should result in a non-zero exit code.

**Describe alternatives you've considered**
Programmatic workaround is not possible here because this option is not yet supported by the Cloud Manager API itself (or at least it is not documented).

首先定位 cloudmanager:pipeline:update 命令的实现和测试，然后跟踪 Web Tier Config pipeline 及其选项的处理方式。完成标准是：该命令接受 Web Tier Config pipeline 所请求的 Code Location 值，并针对其他 pipeline 类型返回非零退出代码，同时覆盖这两种情况的测试。

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