Extract API function parameters to a class for v2

[jason-chan-lf]

• Update code generator to move API function parameters to a separate class and update API function signature
  • In general, it is something like this
    Task<XXX> XXXAsync(XXXParameters parameters, CancellationToken cancellationToken = default(CancellationToken));
  • If there are no required parameters, then the parameters will have default value
    Task<XXX> XXXAsync(XXXParameters parameters = null, CancellationToken cancellationToken = default(CancellationToken));
• Update foreach functions to follow the new function signature
  • In general, it is something like this
    Task ListXXXForEachAsync(Func<XXXCollectionResponse, Task<bool>> callback, ListXXXParameters parameters, int? maxPageSize = null, CancellationToken cancellationToken = default);
• Renamed the GetSelfHostedRepositoryListAsync function to ListSelfHostedRepositoriesAsync to match the new naming conventions
• Update integration tests
• Add missing integration tests