Support older host glibc in appimage distribution

[mborgerson]

Feature Request

• AppImageHub requires supporting oldest maintained Ubuntu LTS
• AppImage doesn't ship an embedded glibc, so we need to support old glibc versions.
• We don't want to ship outdated dependencies like SDL, so supporting this probably means building all dependencies from scratch (which has other benefits) and/or shipping glibc

ref: https://github.com/AppImage/appimage.github.io/pull/3076#issuecomment-1383271611 ref: https://docs.appimage.org/reference/best-practices.html#id3

Alternatives

No response

Additional Context

No response

[doidge-kyle]

Wanted to say experiencing the same thing in LMDE5 as issue#1365 on ver. 7.83

[casasfernando]

Same issue on Debian 11.