[ENH] Add CRD backed SegmentDirectory. #1298

Job	Run time
test (3.7, ubuntu-latest, --ignore-glob 'chromadb/test/property/*' --ignore='chromadb/test/test_c...	9m 5s
test (3.7, ubuntu-latest, chromadb/test/property/test_add.py)	4m 7s
test (3.7, ubuntu-latest, chromadb/test/test_cli.py)	2m 51s
test (3.7, ubuntu-latest, chromadb/test/property/test_collections.py)	4m 30s
test (3.7, ubuntu-latest, chromadb/test/property/test_cross_version_persist.py)	9m 9s
test (3.7, ubuntu-latest, chromadb/test/property/test_embeddings.py)	17m 29s
test (3.7, ubuntu-latest, chromadb/test/property/test_filtering.py)	3m 39s
test (3.7, ubuntu-latest, chromadb/test/property/test_persist.py)	18m 50s
test (3.7, windows-latest, --ignore-glob 'chromadb/test/property/*' --ignore='chromadb/test/test_...	1m 52s
test (3.7, windows-latest, chromadb/test/property/test_add.py)	1m 45s
test (3.7, windows-latest, chromadb/test/test_cli.py)	1m 26s
test (3.7, windows-latest, chromadb/test/property/test_collections.py)	1m 43s
test (3.7, windows-latest, chromadb/test/property/test_cross_version_persist.py)	2m 21s
test (3.7, windows-latest, chromadb/test/property/test_embeddings.py)	1m 45s
test (3.7, windows-latest, chromadb/test/property/test_filtering.py)	2m 29s
test (3.7, windows-latest, chromadb/test/property/test_persist.py)	1m 58s
	1h 24m 59s

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