Adds Linux Support

🎉 The v1.1 release introduces 2 improvements:

1. The action is supported in Linux environments (for example: runs-on:ubuntu-latest) for both dacpac deployment and SQL script execution.
2. The server-name input parameter is now optional. This change is non-breaking - if server-name is present, that value will be used instead of the server name specified in the connection string.

❤️ Thank you @zijchen, @caohai, @yorek, and @llali for contributions to these changes and code health!