pgvector `WithEmbeddingTableName` sanitization conflicts with index creation

[rajaiswal]

When I initialize pgvector like this:

pgv, err := pgvector.New(
                ...
		pgvector.WithEmbeddingTableName("custom_name"),
	)

The WithEmbeddingTableName sanitizes the input and its value becomes "\"custom_name\"", which is set on Store.embeddingTableName.
This then raises an error when the init method is called and it tries to create an index:

sql = fmt.Sprintf(`CREATE INDEX IF NOT EXISTS %s_collection_id ON %s (collection_id)`, s.embeddingTableName, s.embeddingTableName)

The generated error is:

ERROR: syntax error at or near "_collection_id" (SQLSTATE 42601)

I believe we could do away with the sanitization part in WithEmbeddingTableName

[nkwangleiGIT]

@Abirdcfly I think we can remove the sanitization logic for WithEmbeddingTableName, pls help confirm

[Abirdcfly]

pls help confirm

Why use https://pkg.go.dev/github.com/jackc/pgx#Identifier.Sanitize, the relevant context is here: #377 (comment)

IMO, Modify the CREATE INDEX statement or deprecate Sanitize() are both acceptable.

cc @tmc @eliben