UI: Show Account and Project List in the Import Instance Form

### The required feature described as a wish

As a Admin/Operator I would like to select the list of Account and project from the dropdown during the vm import from vmware to kvm

Currently Admin user has to manually type the Account Name and Project Name, this can lead to errors

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We support the listing of account and project during network creation , similarly it should be supported import vm form

首先找到 VM 匯入表單，並將其中的帳戶與專案輸入欄位，與已經列出這些值的現有網路建立表單進行比較。根據附加的螢幕截圖確認所需的下拉選單行為，並驗證管理員在 VMware-to-KVM 匯入期間可以同時選取帳戶與專案，而不必手動輸入。

由索引模型根據 Issue 內容生成。