Infrastructure pipelines work

- [x] Merge internal fork back into this repo - https://github.com/dotnet/vscode-csharp/pull/5754
- [x] Port the simple build validation pipeline - https://github.com/dotnet/vscode-csharp/pull/5798
- [x] Mirror this repo to the dnceng/internal instance - https://github.com/dotnet/versions/pull/892
- [x] Create an official build pipeline out of dnceng/internal - https://github.com/dotnet/vscode-csharp/pull/5800
- [x] Create release pipeline to upload to marketplace (runs in dnceng internal)
- [x] Automatically tag the vscode-csharp AND roslyn commits with release information.
- [x] Do we want to continue doing releases on github as well? If so it'll need to create and upload releases here.
- [ ] Compliance
- [x] Signing server and vsix
- [ ] SBOM
- [x] credscan/poli
- [x] component governance
- [ ] notice file (auto gen?) [link](https://docs.opensource.microsoft.com/using/guidance-for-open-source-usage/required-notice-template/)
- [x] Localization
- [ ] Create devkit insertion pipeline
- [ ] Insert Roslyn into vscode-csharp (maybe on a weekly basis) - longer term