Add two new serializer benchmark trees #2236

Job	Run time
Wheel on macos-13 py-3.8	1m 54s
Wheel on ubuntu-latest py-3.8	2m 14s
Wheel on windows-latest py-3.8	2m 36s
Checks	50s
Run fuzz targets (macos-13, 3.8)	28m 6s
Unit tests (macos-13, 3.8)	5m 43s
Run fuzz targets (ubuntu-latest, 3.8)	18m 32s
Unit tests (ubuntu-latest, 3.8)	3m 32s
coverage	8m 5s
Unit tests (windows-latest, 3.8)	5m 37s
Upload to PyPI	5s
	1h 17m 14s

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