forked from loafle/openapi-generator-original
* update csharp-netcore dependencies
* update test sdk version
* set tests.sdk version to 15.9.2
* rearrange test
* vs 2019 image
* rollback to v4.61.0
* update Microsoft.NET.Test.Sdk version
* Revert "update Microsoft.NET.Test.Sdk version"
This reverts commit 7a86bfc415.
* rollback Microsoft.NET.Test.Sdk