Improve the chance of resolving file/line breakpoints by realpath'ing the support files before doing a second match attempt, with some conditions applied. A working [hello-world example](https://github.com/royitaqi/lldb_demos/blob/main/realpath/README.md). See [patch](https://github.com/llvm/llvm-project/pull/102223) for more info about problem/motivation, details of the feature, new settings, telemetries and tests.