Make `useDispatchedActionData` default to `true` in the next major version

[alwx]

The ReactNavigationIntegration has a useDispatchedActionData option (currently defaulting to false) that uses dispatched action data to improve navigation span quality:

• Names spans immediately from the action payload instead of starting with a generic "Route Change" name
• Skips spans for actions without a known route name (GO_BACK, POP, POP_TO_TOP, RESET), reducing noise
• Filters out non-navigation actions (SET_PARAMS, OPEN_DRAWER, CLOSE_DRAWER, TOGGLE_DRAWER)

This option was introduced as opt-in to avoid breaking changes, but it provides a strictly better experience for all users. In the next major version (9.x), we should flip the default to true.

[linear-code]

RN-574