feat/refactor embedders #2161

Job	Run time
setup (3.9)	5s
api_based_int_test (partitioners)	3m 36s
embedders_int_test	3m 14s
setup (3.10)	7s
check_untagged_tests	7s
api_based_int_test (chunkers)	7m 29s
src_e2e_test (3.9)	3m 9s
src_api_test	31s
src_e2e_test (3.10)	8m 42s
dest_e2e_test (3.9)	1m 14s
dest_e2e_test (3.10)	3m 3s
blob_storage_connectors_int_test	1m 56s
nosql_connectors_int_test	7m 14s
sql_connectors_int_test	3m 12s
uncategorized_connectors_int_test	4m 36s
vector_db_connectors_int_test	5m 40s
	53m 55s

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