[General] add optional '--no-https' flag for legendary args for LanCache compatibility

[Keksgesicht]

fixes issue #1032
Epic Games uses also only http for downloads.
This flag is default disabled, can be enabled via the advanced settings and gets applied to the uses of legendary commands "install", "update" and "repair".
New settings option has translations for english and german. Other languages are missing.

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Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[Nocccer]

LGTM

[arielj]

How did you add the changes in the translation files? check this https://github.com/Heroic-Games-Launcher/HeroicGamesLauncher/wiki/Translations#how-to-add-new-translatable-strings

Currently languages other than english and german will show an empty string instead of english. You should only add the key and the fallback in the code and use yarn i18next to udpate the files. Then, to add the geman translation, you have to use weblate instead of the code directly.

[flavioislima]

LGTM! 👍🏽

[flavioislima]

@Keksgesicht thanks for the contribution :)