fix: allow unsandboxed renderers to request new privileges (5-0-x)

[the-j0k3r]

Description of Change

Backport of #19953

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• tests are changed or added
• relevant documentation is changed or added
• PR title follows semantic commit guidelines
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

If this fails test please help if you can.

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[the-j0k3r]

I dont think theres anything I can do to fix the errors, and if there is Ive no idea what =)

[nornagon]

The 5.x release line is no longer supported.

[yacc143]

The 5.x release line is no longer supported.

So why does Atom, which is not exactly a trivial or irrelevant Electron app, still use 5.x?

I'm currently wondering if it's worth my time to code up a crude work around (think LD_PRELOAD, fiddling with prctl, thus potentially making my Atom a little bit less safe), or if the issue that make the Atom Terminal Tab a bit useless (all snap installed binaries are symlinks to /usr/bin/snap, a suid root binary, and Ubuntu is delivering more and more stuff via snaps nowadays).

E.g. on my laptop the aws "binary" is a link /usr/bin/snap. Does not work in my editor terminal tab. My working environment setup scripts using fabric internally call sudo, oops. And so on.

[the-j0k3r]

@yacc143

See atom/atom#20764 (comment)

Eventually Atom will ship a version of electron thats supported, until then thats the official explanation