SOS Watson support work items

[mikem8361]

Here is a list of possible work and testing that needs to take place before Watson can take a new version of SOS:

• [x] Support Watson .sympath's which contain alternate symbol providers dlls like symsrv*symsrv.dll*d:\data\SYM\symcache*\\aw0eus0symcache.file.core.windows.net\Symbols*http://localhost/remote200/30e07e1454924e55901d7f693f7eddf1/0/x64/4542784547/remote.
• [ ] Test the Microsoft.DiaSymReader.Native symbol download code for Windows and Portable PDBs. Figure out why it can't handle the above Watson .sympaths.
• [x] Test the C++ (no managed SOS code loaded) fallback path.
• [ ] Test the _EFN_* APIs that Watson uses.
• [ ] Check the SOS performance in general and the _EFN_* APIs.
• [ ] Test with !analyze on the various dump resources needed to test Watson.

[mikem8361]

The !analyze SOS calls: https://microsoft.visualstudio.com/OS/_git/os.2020?version=GBofficial%2Foc_es_debug&path=%2Fsdktools%2Fdebuggers%2Fexts%2Fbadev%2FCLRMA%2Fclrmasos%2FSOSHelper.cpp

[mikem8361]

Another example of a sympath that needs to be supported or partially supported: “srv*d:\data\SYM\symcache\\aw0mwh0symcache.file.core.windows.net\symbolshttp://localhost/remote200/beb799207d6f47cda222e281c9e5ea7a/0/x64/4357289324/remote”.

[mikem8361]

Related issue: https://github.com/dotnet/diagnostics/issues/2438