ci: moved from MSTest to Xunit#1

Mastermindzh wants to merge 3 commits into

feature/automated-github-builds-test-and-deployfrontlinersnl/growthbook-c-sharp:feature/automated-github-builds-test-and-deployfrom

fix/moved-to-xunitfrontlinersnl/growthbook-c-sharp:fix/moved-to-xunitCopy head branch name to clipboard