Customize nz-upload-list style when using nz-upload

[guxin0123]

What problem does this feature solve?

Sometimes the upload button is in the drop-down menu, at this time the upload file list and upload progress should be displayed anywhere else

What does the proposed API look like?

<nz-upload nzAction="https://jsonplaceholder.typicode.com/posts/" nzContainer="container">
   <button nz-button><i nz-icon nzType="upload"></i><span>Click to Upload</span></button>
</nz-upload>
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