[Tests] Add shared value e2e test (#4434)

## Description

Updates `Shared value` example and adds an e2e argent flow

## Test plan

`argent flow run shared-value-test`

Jakub Piasecki committed 17d ago

8ac11e336b6cb6165030db81cc22436fbac77e77

Parent: 399e899

Committed by GitHub <noreply@github.com> on 8/18/2026, 2:36:38 PM