fix(withdraw): ignore user-cancelled passkey signing errors

[sentry]

This PR addresses an issue where Sentry was logging TurnkeyActivityError: Failed to sign: The user cancelled the request. when users dismissed the passkey/Turnkey prompt during the EIP-712 signing step in the useWithdrawRainCollateral hook.

Root Cause:
The smartAccountClient.account.signTypedData call (Step 4) occurs before executeTransactions (Step 5). When a user cancelled the passkey prompt during this signing step, the error bypassed the isWebAuthnUserCancelledError guard, which was only present within executeTransactions. Consequently, Sentry.captureException was called unconditionally, leading to unnecessary error reports.

Changes Made:

1. Import isWebAuthnUserCancelledError: Added isWebAuthnUserCancelledError to the import statement from @/lib/execute in hooks/useWithdrawRainCollateral.ts.
2. Guard Sentry Capture: Implemented a check in the catch block of useWithdrawRainCollateral.ts to detect user-cancelled WebAuthn errors. If isWebAuthnUserCancelledError(err) returns true, Sentry capture is skipped, and the hook's status is set to Status.IDLE (instead of Status.ERROR), treating it as a user-initiated cancellation rather than an application error.
3. Added Unit Tests: Created hooks/__tests__/useWithdrawRainCollateral.test.tsx with tests to ensure Sentry is not called for user cancellations and is called for other types of errors during the signing process.

This change reduces Sentry noise and accurately reflects user intent when cancelling a passkey prompt.

Fixes SOLID-W5

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