MacOS createdump and createdump cleanup. (#37224)

MacOS createdump and createdump cleanup. (#37224)

* General createdump cleanup.

Converted the char* name fields (process name in CrashInfo and module name in MemoryRegion) to std::string for easier cleanup and usage.

Removed the vestiges of the SOS support (the m_sos flag, ThreadInfo::GetRegistersWithDataTarget(), etc.).

Moved the Linux read memory code out of the DataTarget into CrashInfo. DataTarget is now a thin wrapper around CrashInfo.

In the dumpwriter, fix the "number of program headers" calculate to just the ones backed by memory. Only write the memory regions backed by memory.  This makes lldb fail the memory read in these regions instead of returning zeros.

Removed the TRACE macro from the ElfReader; use the Trace() virtual method directly.

* Add MacOS createdump

Add MachO in-memory module reader (MachOReader).

Refactor CrashInfo and ThreadInfo in Unix and MacOS versions.

Enabled crash/unhandled exception createdump trigger.

Add unwind and eh frame info to coredump