Add rspec ci

[mdzhang]

asana

skip a test that github actions didn't like since i figure running these and skipping that test is better than not running any tests whatsoever

remove coveralls reporter also failing ci ootb

hopefully the official ruby sdk is out before we touch anything remotely related to worker signals

example github action signal failure: https://github.com/indie-technologies/temporal-ruby/actions/runs/3596648346/jobs/6057690741

  #start
    starts a poller for each namespace/task list combination
    can have an activity poller with a different thread pool size
    sleeps while waiting for the shutdown
    when middleware is configured
      starts pollers with correct middleware
    signal handling
##[debug]Re-evaluate condition on job cancellation for step: 'Run bundle exec rspec --format documentation'.
##[debug]Skip Re-evaluate condition on runner shutdown.
      traps TERM signal
      traps INT signal


...


Error: The operation was canceled.
##[debug]System.OperationCanceledException: The operation was canceled.
##[debug]   at System.Threading.CancellationToken.ThrowOperationCanceledException()
##[debug]   at GitHub.Runner.Sdk.ProcessInvoker.ExecuteAsync(String workingDirectory, String fileName, String arguments, IDictionary`2 environment, Boolean requireExitCodeZero, Encoding outputEncoding, Boolean killProcessOnCancel, Channel`1 redirectStandardIn, Boolean inheritConsoleHandler, Boolean keepStandardInOpen, Boolean highPriorityProcess, CancellationToken cancellationToken)
##[debug]   at GitHub.Runner.Common.ProcessInvokerWrapper.ExecuteAsync(String workingDirectory, String fileName, String arguments, IDictionary`2 environment, Boolean requireExitCodeZero, Encoding outputEncoding, Boolean killProcessOnCancel, Channel`1 redirectStandardIn, Boolean inheritConsoleHandler, Boolean keepStandardInOpen, Boolean highPriorityProcess, CancellationToken cancellationToken)
##[debug]   at GitHub.Runner.Worker.Handlers.DefaultStepHost.ExecuteAsync(IExecutionContext context, String workingDirectory, String fileName, String arguments, IDictionary`2 environment, Boolean requireExitCodeZero, Encoding outputEncoding, Boolean killProcessOnCancel, Boolean inheritConsoleHandler, String standardInInput, CancellationToken cancellationToken)
##[debug]   at GitHub.Runner.Worker.Handlers.ScriptHandler.RunAsync(ActionRunStage stage)
##[debug]   at GitHub.Runner.Worker.ActionRunner.RunAsync()
##[debug]   at GitHub.Runner.Worker.StepsRunner.RunStepAsync(IStep step, CancellationToken jobCancellationToken)