Push Microsoft.Diagnostics.NETCore.Client to release branch (dotnet#705)

* Microsoft.Diagnostics.NETCore.Client Implementation (dotnet#617)

This is the initial implementation of Microsoft.Diagnostics.NETCore.Client library.

This will be released with version 1.0.0-preview, and when I feel that enough customers have validated it that we can match it with the rest of the diagnostics OOB packages and bump up the version to 3.1.

* add .NET Standard 2.0 for diagnostics client library (dotnet#700)

* Make MultiplePublishedProcessTest more stable (dotnet#701)

* Make MultiplePublishedProcessTest more stable

* Bump up DiagnosticsClient library version to 0.2.0 (dotnet#704)

Merge pull request dotnet#648 from mikem8361/release/stable

3.1 merge from master

Various fixes from master (dotnet#554)

Verbose logging for symbol publish

Change to stable version (no preview tag)

Fix product version string and update docs

Remove source link disabling

Display internal SOS status with sosstatus command

Add dumpvc to dotnet-dump/lldb commands.

Remove reductant dotnet-dump error message when SOS command fails.

Fixes issues:

    dotnet#511
    dotnet#508
    dotnet#509

Change SyncBlk test not to run on xplat.

Fallback to portable PDB support if getting the module's metadata importer fails.

Both Windows and Portable PDBs are published.

Change to Windows PDB for SOS.NETCore.dll in sos symbol zip file

Publish Microsoft.Diagnostics.TestHelpers, DebugServices, Repl and RuntimeClient symbols

Update symstore to 1.0.50701.

Switch to BYOC pools

Verbose logging for symbol publish (dotnet#491)

Change to stable version (no preview tag)

Fix product version string and update docs

Remove source link disabling

Merge pull request dotnet#461 from mikem8361/release/3.0

Update docs to Preview 9 version

Update tool version 3.0.0-preview8.19412.1 (dotnet#425) (dotnet#426)

Merge pull request dotnet#402 from mikem8361/release/3.0

Update documents to preview 7 version

Update to Preview 6 version: 1.0.4-preview6.19311.1 (dotnet#336)

Update docs for preview 5. (dotnet#238) (dotnet#239)

Update the tools version to 1.0.3-preview5.19251.2.

Preview5 doc update. (dotnet#225) (dotnet#226)

Add Release notes for dotnet-dump.

Remove --add-source in installation instructions.