fix(transaction-pay): allow undefined useExactInput in getTradeType

isMaxAmount and isPostQuote are both optional, so useExactInput is
boolean | undefined and the build failed on the narrowed parameter type.

Author: abretonc7s

packages/transaction-pay-controller/src/strategy/relay/relay-quotes.ts

@@ -645,7 +645,7 @@ function isHypercoreDeposit(request: QuoteRequest): boolean {
  * @returns The Relay trade type.
  */
 function getTradeType(
-  useExactInput: boolean,
+  useExactInput: boolean | undefined,
   useExactOutput: boolean,
 ): RelayQuoteRequest['tradeType'] {
   if (useExactInput) {