hint client of download filename

[alambare]

Is your feature request related to a problem? Please describe.

Currently EODAG server does not give the filename when downloading data.

For example, the following command will download and name it "download".

wget http://localhost:8000/collections/S1_SAR_GRD/items/S1A_IW_GRDH_1SDV_20230831T234123_20230831T234152_050126_060852_FA06/download"

Describe the solution you'd like
A clear and concise description of what you want to happen.

Add the "Content-Disposition" header in download request response to hint the client of the filename.

Content-Disposition: attachment; filename="S1A_IW_GRDH_1SDV_20230831T234123_20230831T234152_050126_060852_FA06.zip"

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

We could also update URLs to look like the following instead. Or we could do both (header + URL).

http://localhost:8000/collections/S1_SAR_GRD/items/S1A_IW_GRDH_1SDV_20230831T234123_20230831T234152_050126_060852_FA06/download/S1A_IW_GRDH_1SDV_20230831T234123_20230831T234152_050126_060852_FA06.zip"

Additional context
Add any other context about the feature request here.

[sbrunato]

The "Content-Disposition" header is already used, but not implemented for all the download plugins. We should make sure it is

[sbrunato]

asset subset download will already use the {item}/download/{key} url pattern. See #889 and #932

Please use wget --content-disposition to make wget read filename from headers