Update AspNetCore to use MetadataUpdateHandlerAttribute to clear caches

[pranavkm]

• Blazor re-rendering
• Blazor Routing
• ASP.NET Core's routing

The last two bits are currently blocked since they're treated as rude edits

[ghost]

Thanks for contacting us.
We're moving this issue to the Next sprint planning milestone for future evaluation / consideration. Because it's not immediately obvious that this is a bug in our framework, we would like to keep this around to collect more feedback, which can later help us determine the impact of it. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[davidfowl]

I assume for routing we can trigger a change token and be done

[pranavkm]

Yup that's the plan. Routing is still a bit busted because changing custom attributes is currently treated as rude edit, but that is expected to be allowed soon-ish.

[pranavkm]

This is done. There's some additional cache clearing we need to do as part of the reloadable type effort, but that is being tracked separately.