Ensure hardware acceleration devices have proper group permissions

[metronidazole]

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• I have read the contributing guideline and understand that I have made the correct modifications

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Description:

This fixes issue #111 (and probably a lot of cases of #26 ) by ensuring all detected hardware acceleration devices have group permissions set (g+rwx). This is required for hardware acceleration to work if the docker host system does not have any group permissions set for them (these get replicated into the docker container)

Benefits of this PR and context:

Fixes hardware acceleration for many users, including those with synology devices which by default don't have group permissions set for the intel quicksync device (/dev/dri/renderD128)

How Has This Been Tested?

Yes - single line of code.

Source / References:

See #111

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[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/jellyfin/10.7.5-1-pkg-fd286eef-pr-112/index.html
https://ci-tests.linuxserver.io/lspipepr/jellyfin/10.7.5-1-pkg-fd286eef-pr-112/shellcheck-result.xml

[aptalca]

I don't believe you can change device permissions from inside the container unless it's running with --privileged

[metronidazole]

I don't believe you can change device permissions from inside the container unless it's running with --privileged

You can using CgroupPermissions which is what a number of people use with synology devices.

See https://www.reddit.com/r/jellyfin/comments/exepia/synology_users_how_to_enable_hardware/fhv32z5/

I wouldn't have submitted this if it didn't work.

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