Create a createdump static library for single-file dump generation (#84864)

Create a createdump static library for single-file dump generation (#84864)

* Create a createdump static library for single-file and native AOT dump generation

A "createdump_static" lib is now built that is linked into the single-file host and
in the future can be linked into a Native AOT host/app going forward. For single-file
apps most of the same unhandled exception or crash dump generation code is the same
(same env vars, most of all the PAL code is the same) except where createdump executable
was execve, a callback invokes (set by the host) the static createdump lib entry point.

File full dumps are generated (which currently are very large under MacOS) but the user
can put the DAC side-by-side with their app and the smaller heap or mini dumps can be
generated. The SDK could give an option to publish the DAC SXS for a single-file app.