PDEP-14: Dedicated string data type for pandas 3.0 (#58551)

Co-authored-by: Simon Hawkins <[email protected]>
Co-authored-by: Irv Lustig <[email protected]>
Co-authored-by: William Ayd <[email protected]>
Co-authored-by: Richard Shadrach <[email protected]>
Co-authored-by: Patrick Hoefler <[email protected]>