Infrastructure pipelines work

[dibarbet]

• Merge internal fork back into this repo - Merge internal fork of LSP tools host back #5754
• Port the simple build validation pipeline - Set pools for CI build #5798
• Mirror this repo to the dnceng/internal instance - Mirror vscode-csharp branches versions#892
• Create an official build pipeline out of dnceng/internal - Add official build pipeline definition #5800
• Create release pipeline to upload to marketplace (runs in dnceng internal)
  • Automatically tag the vscode-csharp AND roslyn commits with release information.
  • Do we want to continue doing releases on github as well? If so it'll need to create and upload releases here.
• Compliance
  • Signing server and vsix
  • SBOM
  • credscan/poli
  • component governance
  • notice file (auto gen?) link
  • Localization
• Create devkit insertion pipeline
• Insert Roslyn into vscode-csharp (maybe on a weekly basis) - longer term

[arunchndr]

@Cosifne fyi. Post official build pipeline out of dnceng/internal the rest of the work can be parallel. Please work with David to help.

[arunchndr]

Adding Localization to the list. Note this is not a GA blocker given the cost. @webreidi and @mikadumont fyi