support custom traffic shaping controller

[icodening]

Describe what this PR does / why we need it

support custom traffic shaping controller

Does this pull request fix one issue?

ref #3189

Describe how you did it

using TrafficShapingControllerFactory spi to create instance

Describe how to verify it

Special notes for reviews

[uuuyuqi]

Nice work. By the way, could you add some unit tests? The new version of ci does have coverage checks

[z-soulx]

Describe what this PR does / why we need it

support custom traffic shaping controller

Does this pull request fix one issue?

ref #3189

Describe how you did it

using TrafficShapingControllerFactory spi to create instance

Describe how to verify it

Special notes for reviews

Hi @icodening , thank you so much for this PR — I think your implementation idea is really great!
I’m also very interested in getting this feature officially supported as soon as possible.
If you’re okay with it, I’d like to fork your branch and add some unit tests to help move it forward.
I’ll make sure to credit your original contribution in the new PR.

Thanks again for your work!

[z-soulx]

#3189

#3567 Hi,@uuuyuqi — when you have time, please help take a look at this PR.
It’s a follow-up to @icodening’s earlier work, with some enhancements and clarifications.

[LearningGp]

We'll continue discussing this issue in PR #3567.