chore(frontend): Optimize requests made to the backend

[amanape]

End-user friendly description of the problem this fixes or functionality that this introduces
A request would be made every time a component that contained a query hook were to mount (e.g., toggling the settings modal)

• Include this change in the Release Notes. If checked, you must provide an end-user friendly description for your change below

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Give a summary of what the PR does, explaining any non-trivial design decisions
Change the default staleTime to 5 minutes and gcTime (how long data remains in cache) for 15 minutes. As a result, this will no longer make frequent calls to the API.

NOTE!

This is set to the global query client which means every query will now have the same staleTime value. If there would be a query we want to make more frequently, we will have to explicitly set it on that query's options.

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Link of any specific issues this addresses

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To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:f6677c8-nikolaik   --name openhands-app-f6677c8   docker.all-hands.dev/all-hands-ai/openhands:f6677c8