cpython and cpython_sym look like the same labels in integration_tests

[Shaikh-Ubaid]

lpython/integration_tests/CMakeLists.txt

Line 216 in dfeacbc

elseif((KIND STREQUAL "cpython") OR (KIND STREQUAL "cpython_sym"))

It seems cpython and cpython_sym labels in the integration_tests/CMakelists.txt are similar (or even same). In that case, I think we can remove cpython_sym and simply reuse cpython for simplicity.