Possibility to select Base Folder Path in vCenter provider

### Description of the feature you would like to add / User story

This request originates from a customer support ticket.

It would be helpful to have the option to select the "Base Folder Path" from a dropdown menu or type in a custom path.

The user currently relies on Chrome Developer Tools to copy the folder path from the Folder dropdown, which is not convenient.

Adding this functionality would make it easier to select the correct Base Folder Path during setup.

### Solution details

- Provide a dropdown menu with existing folder paths for the "Base Folder Path" field.

### Alternative approaches

### Use cases

### Additional information

The issue concerns the vCenter provider setup and its Base Folder Path field, but names no source file or test. Start by locating that field and the code that loads existing folder paths; verify how the dropdown should obtain and display them, then confirm completion with coverage for selecting a valid path during setup.

Written by the indexing model from the issue text.