Add Quick Run and Custom Run to the flow's Deployments tab

Current behavior

In V2, the row menu on a flow's Deployments tab offers only Copy ID. Users must open a deployment's detail page to reach its Run menu, even though the global Deployments table already provides Quick Run and Custom Run actions.

Adding those actions to the flow's deployment rows would let users launch a run while inspecting the deployments associated with that flow.

Reproduction

1. Open a flow with an existing deployment in V2.
2. Select the flow's Deployments tab and open the deployment row's menu.
3. Observe that only Copy ID is available. Compare with the same deployment's menu on the global Deployments page.

Expected behavior

• Offer Quick Run and Custom Run alongside Copy ID.
• Quick Run targets the selected deployment and prompts for required parameters when needed.
• Custom Run opens the existing run form for that deployment.
• Preserve existing pending-state, error, and parameter-dialog behavior.

Version info

Observed locally with V2 at 9795fc271c, using synthetic data and an isolated Prefect server (3.8.4.dev1). The relevant code is unchanged on main at 33de4078a0.

Implementation notes

The flow-scoped row menu only implements Copy ID. Reuse the global table's existing useQuickRun integration and Custom Run link.

This enhancement is separate from restoring related-resource links on run cards in #23106.