Provide a stable export mangled name for "test_function()" #793

Job	Run time
Benchmark	7m 27s
Build [ubuntu-latest, 1.64.0, dev, ]	3m 50s
Build [ubuntu-latest, 1.64.0, release, ]	3m 55s
Build [ubuntu-latest, stable, dev, ]	19s
Lint with clippy	1m 1s
Generate documentation	20s
Build [ubuntu-latest, stable, release, ]	34s
Check generated C header	1m 10s
Build [macos-latest, 1.64.0, dev, ]	6m 1s
No-op rebuilds	59s
Build [macos-latest, 1.64.0, release, ]	5m 20s
Test and coverage	2m 40s
Build [macos-latest, stable, dev, ]	1m 4s
Check code formatting	22s
Test with release build	2m 50s
Build [macos-latest, stable, release, ]	1m 10s
Test with address sanitizer	4m 24s
Build [ubuntu-latest, stable, dev, --no-default-features]	22s
Test with leak sanitizer	3m 18s
	47m 6s

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