Gateways take proxy configuration while it mustn't

[exalate-issue-sync]

Describe the bug :

A clear and concise description of what the bug is.

To Reproduce :

1. leave blank the “proxy host” field
2. set “use system proxy”
3. save
4. check in the values for both proxy_host and proxy_host they are both like grayed, but in the export of the api they are still present Attachment - image.png

Also a video of the issue

Tested in 4.0.9, 3.20.17

Gravitee.io.Management.-.Google.Chrome.2023-10-04.15-43-07.mp4

[exalate-issue-sync]

This issue has been fixed in versions 3.20.21, 4.1.1, 4.0.10