Add ikkoham as code owner for quantum_info and opflow (#7543)
Add ikkoham as code owner for quantum_info and opflow (#7543)

Ikko has been doing great work maintaining the opflow and quantum_info
code bases. The optimization and improvements he's made there have
greatly improved performance and he has shown an understanding and
respect for the code contribution guidelines and review process.
This commit adds him as a codeowner of those submodules which gives him
merge permission on PRs that touch either submodule and a formal
responsibility to review and maintain both submodules.

Co-authored-by: mergify[bot] <b09a6ee808b67e98a221404e7aaa52e0398a4954@users.noreply.github.com>
QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py