feat: add end-to-end tests for sqlcmd binary (fixes #641)#642

dlevy-msft-sql merged 2 commits intomicrosoft:mainmicrosoft/go-sqlcmd:mainfrom

dlevy-msft-sql:feature/e2e-tests-641dlevy-msft-sql/go-sqlcmd:feature/e2e-tests-641Copy head branch name to clipboard