Use the libasr's CMakeLists in LFortran's one
Now the actual src/libasr/CMakeLists.txt file is used as part of LFortran's build system, and thus from now on we only maintain one CMake build system for libasr with no duplications.
The 17.0 major release is coming on May 16, 2024! This version brings many exciting improvements to GitLab, but also removes some deprecated features. We are introducing three breaking change windows during which we expect breaking changes to be deployed to GitLab.com. You can read more about it on our blogpost. The second breaking change window begins 2024-04-29 09:00 UTC and ends 2024-05-01 22:00 UTC.
Now the actual src/libasr/CMakeLists.txt file is used as part of LFortran's build system, and thus from now on we only maintain one CMake build system for libasr with no duplications.