Delete `RemoteFormAllIssue`, add `path` to `RemoteFormIssue`

### Describe the problem

#14784 added a new `RemoteFormAllIssue` interface that contains `path` alongside `message`. This feels a bit weird to me. Aside from being clunkily named, why wouldn't we just have a single interface that includes `path`? On issues that don't need it, it's harmless.

### Describe the proposed solution

Revert #14784, add `path` to `RemoteFormIssue`.