Since we now use uucode, we don't need ziglyph anymore. Ziglyph was kept around as a test-only dep so we can verify matching but this is complicating our Zig 0.15 upgrade because ziglyph doesn't support Zig 0.15. Let's just drop it.
Follow up to #8810 Same reasoning.
This makes it cleaner to add new sources of table generation and also avoids inadvertently depending on different modules (despite Zig's lazy analysis). This also fixes up terminal to only use our look up tables which avoids bringing ziglyph in for the terminal module.