Create Split Array Largest Sum.cpp

[PrathmeshMutke]

Description

Split Array Largest Sum Program

Fixes #2521

Replace issue_no with the issue number which is fixed in this PR

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Documentation Update

Checklist:

• [*] My code follows the style guidelines(Clean Code) of this project
• [*] I have performed a self-review of my own code
• [*] I have commented my code, particularly in hard-to-understand areas
• [*] My changes generate no new warnings