removed host filesystem access, replaced with sane locations

[boredsquirrel]

it should not have host access

This is not hardening, its simply all the locations media file actually are at. Its a start for easier hardening also for users

• --filesystem=home
• --filesystem=/media
• --filesystem=/mnt
• --filesystem=/run/media
• --filesystem=/var/run/media
• --filesystem=/var/mnt

[flathubbot]

Started test build 61848

[flathubbot]

Build 61848 was cancelled