Added code for palindrome partitioning problem under dynamic programming (#7222)

* Added code for palindrome partitioning problem under dynamic programming

* Updated return type for function

* Updated Line 24 according to suggestions

* Apply suggestions from code review

Co-authored-by: Caeden Perelli-Harris <caedenperelliharris@gmail.com>

* Update palindrome_partitioning.py

* Update palindrome_partitioning.py

* is_palindromic

Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: Caeden Perelli-Harris <caedenperelliharris@gmail.com>