loop-in: quote does not use last hop pubkey

[djkazic]

Expected behavior / Actual behavior
A loop cli quote for my WOS loop in of 350k sat @ 6 conf_target is giving 177 sats for service fee, while terminal is giving 5 sats. Looks like the discrepancy is that last hop pubkey isn't being set for the quote, which in turn means the subsequent loopIn will likely fail if that node is more expensive than a quote that doesn't specify a node to loop in to.

Here we would want to use loopInLastHop:

lightning-terminal/app/src/store/views/buildSwapView.ts

Lines 426 to 428 in 9ad3f06

	const inQuote = await this._store.api.loop.getLoopInQuote(
	amount,
	this.confTarget,

Also would want a new param here for passing in that hop if it's specified:

lightning-terminal/app/src/api/loop.ts

Line 57 in 9ad3f06

async getLoopInQuote(

[levmi]

This ended up being just relevant for the litd binary UX. Has been fixed, will be merged shortly and included in next release. #920