Notwithstanding any other provision of law, when any public entity or any public official acting in a fiduciary capacity, who is required or authorized by law to deposit funds in the county treasury, makes a deposit, those funds shall be deemed to be held in trust by the county treasurer on behalf of the depositing entity or public official. The funds shall not be deemed funds or assets of the county and the relationship of the depositing entity or public official and the county shall not be one of creditor-debtor.