Added more filtering options to pgvector vectorstore (#14852)
- **Description:** Using PGVector vector store, it was only possible to
filter for values equals, in or not in metadata. Extended this feature
to work with the following keywords : IN, NIN, BETWEEN, GT, LT, NE, EQ,
LIKE, CONTAINS, OR, AND
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Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>
