Investigate making it possible to run 2 host processes in parallel on Windows

[simongdavies]

On Windows we depend on the HyperlightSurrogate process to provide a host process for memory that we subsequently map into a VM.

If more than one hyperlight host processes is started on Windows then the second and subsequent ones fail with an error stating that HyperlightSurrogate.exe is in use.

I believe that this is caused by hyperlight trying to copy the surrogate process binary to disk when the second or subsequent process starts , we should fix it tom make it possible to run more than one host concurrently