Consider aborting in-flight HTTP requests on unmount in useHttpClient

## Context

Both `useHttpClient` implementations create a memoized `HttpClient`/`IHttpClient` instance but never abort/dispose it when the owning component unmounts:
- [`packages/react/framework/src/hooks/use-http-client.ts`](https://github.com/equinor/fusion-framework/blob/main/packages/react/framework/src/hooks/use-http-client.ts)
- [`packages/react/modules/http/src/useHttpClient.ts`](https://github.com/equinor/fusion-framework/blob/main/packages/react/modules/http/src/useHttpClient.ts)

## Task

Investigate whether in-flight requests made through a client obtained via `useHttpClient` should be aborted when the consuming component unmounts (e.g. via an `AbortController` tied to a `useEffect` cleanup), to avoid state updates after unmount or wasted network calls.

## Acceptance criteria

- [ ] Decide whether abort-on-unmount is needed given how `HttpClient`/`IHttpClient` consumers typically use the returned client
- [ ] If needed, implement and cover with a test in both hooks; if not needed, remove the TODO comments

Start with packages/react/framework/src/hooks/use-http-client.ts and packages/react/modules/http/src/useHttpClient.ts, then inspect how HttpClient/IHttpClient consumers use the returned client and how the TODO comments relate to unmounting. Decide whether abort-on-unmount is appropriate; if so, add tests for both hooks, otherwise remove the TODO comments.

Written by the indexing model from the issue text.