Support dynamic module in EEP

[zhaohuabing]

This will allow Envoy proxy to load shared libraries at runtime to extend its functionality.

This will unblock envoyproxy/ai-gateway#90 .

references:

• https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/advanced/dynamic_modules
• https://github.com/envoyproxy/dynamic-modules-examples

[Xunzhuo]

Before we started to implement, should we bump envoy version?

[github-actions]

This issue has been automatically marked as stale because it has not had activity in the last 30 days.

[jukie]

Is there a good way to map the envoy version to the dynamic_module dependency version? I'm starting on this in #8278 but am wondering if we can reuse something from https://github.com/envoyproxy/dynamic-modules-examples instead. The challenge will come for patch releases of prior versions and needing to rebuild the image.

CC @mathetake do you have any suggestions? 92e2508
would you be willing to publish tags in the example repo for v1.36, v1.37 etc?

[zhaohuabing]

Update: remote data source will be supported in envoy after envoyproxy/envoy#43333 lands. cc @jukie