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

Co-authored-by: Simon Hawkins <simonjayhawkins@gmail.com>
Co-authored-by: Irv Lustig <irv@princeton.com>
Co-authored-by: William Ayd <william.ayd@icloud.com>
Co-authored-by: Richard Shadrach <45562402+rhshadrach@users.noreply.github.com>
Co-authored-by: Patrick Hoefler <61934744+phofl@users.noreply.github.com>