refactor(core): simplify fonts handling #2730

Job	Run time
Firmware (universal, debuglink)	3m 50s
Firmware (btconly, debuglink)	3m 38s
Emulator (universal, debuglink, x86_64, noasan)	3m 13s
Emulator arm	0s
Emulator (btconly, debuglink, x86_64, noasan)	3m 12s
Post comment with UI diff URLs	13s
Upgrade test (noasan)	3m 35s
HWI test	0s
Device test (universal, noasan)	8m 32s
Device test (btconly, noasan)	4m 41s
Upload emulator binaries	0s
UI diff from main branch	2m 30s
	33m 24s

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