[coro_http_client][feat]add user data

[qicosmos]

Why

add user data for coro_http_request.

What is changing

Example

    auto user_data = req.get_user_data();
    auto val = std::any_cast<std::shared_ptr<int>>(user_data);
    CHECK(*val == 42);

[github-actions]

for detail, goto summary download Artifacts base-ylt-cov-report(base commit coverage report) and ylt-cov-report(current pull request coverage report)

[github-actions]

for detail, goto summary download Artifacts base-ylt-cov-report(base commit coverage report) and ylt-cov-report(current pull request coverage report)