enable skipped tests for windows

[GiladShoham]

There are many tests currently disabled for windows:

• [ ] all tests against the local registry (verdaccio) (see SKIP_REGISTRY_TESTS: true env variable on windows_e2e config for circle)
• [ ] all tests against bit.dev servers (see SKIP_BIT_DEV_TESTS: true env variable on windows_e2e config for circle
• [ ] all tests with the following structure:

if (IS_WINDOWS || process.env.APPVEYOR === 'True') {
      // @ts-ignore
      this.skip;
    } 

The registry tests are disabled mainly because the npm add user command to authenticate against the local server is interactive so we used expect which is a Linux tool to enter the credentials. This might be replaced by npm-cli-login.