Deterministic resolving of mixed component/contour glyphs #2978

Job	Run time
fontbe tests	1m 6s
Rustfmt	1m 40s
cargo check no std	1m 40s
resources/scripts/ots_test.sh	1m 16s
Clippy lints	1m 40s
cargo test fea-rs	1m 3s
fontc tests	1m 19s
tests other than fontbe,fontc	2m 18s
Build GS and check the result	3m 16s
	15m 18s

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