[colorfont_tables] Fails for any variable font with `SVG` table

[khaledhosny]

Observed behaviour

colorfont_tables will FAIL if a font is both variable and have an SVG table. Even though SVG table indeed does not support font variations, not every glyph in a variable fonts has variations and a font might be a variable font and a color font but the color glyphs have no variations.

Expected behaviour

The check should see if color glyphs included in the SVG table correspond to glyphs with variations in the gvar or CFF2 tables before FAIL’ing such fonts.

Resources and steps needed to reproduce

https://github.com/aliftype/raqq/releases/tag/v2.00 FAIL’s with this check even though the color glyphs have no variations.

[felipesanches]

Earlier today this check was listed as part of Universal profile (because earlier this month I hoped it would be useful for everybody) and it was also listed in the pending_review list of most of the vendor-specific profiles, so it was not in fact active for them until getting reviewed and approved.

@khaledhosny made it clear that this should definitely not be placed in Universal, so at PR #4949 I moved it back to Google Fonts profile.

The description of this issue, though, seems to be valid regardless of the chosen profile, so I'll keep it open.
But would you it be OK if we address this after the v0.13.0 release?