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cbec43af - community[patch]: avoid creating extension PGvector while using readOnly Databases (#19268)

community[patch]: avoid creating extension PGvector while using readOnly Databases (#19268) - **Description:** PgVector class always runs "create extension" on init and this statement crashes on ReadOnly databases (read only replicas). but wierdly the next create collection etc work even in readOnly databases - **Dependencies:** no new dependencies - **Twitter handle:** @VenOmaX666 Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>