fix: allow running docker runner as non-root user

[wojciechka]

Melange Pull Request Template

Functional Changes

• This change can build all of Wolfi without errors (describe results in notes)

Notes:

SCA Changes

• Examining several representative APKs show no regression / the desired effect (details in notes)

Notes:

Linter

• The new check is clean across Wolfi
• The new check is opt-in or a warning

Notes:

[maxgio92]

Related issue #1647

[smoser]

Do you have a recreate on this ?
#1649 landed and "fixed" a trivial case, that is described with recreate in #1254 .

Also, can you clarify "allow running docker runner as non-root user"? On the workstation setups, I run as user 1000 and can build lots of packages with the docker runner. the docker runner there does run privileged.