Avoid retrying when the tab/frame doesn't exist

[fregante]

If a tab/frame does not exist at all, it should not be retried, as it will never exist. This does not apply to named targets.

The problem is detecting the difference between a non-responsive tab and a non-existing one without also using tabs.get and/or browser.webNavigation.getAllFrames

Related:

• Running brick in broadcast mode takes 4+ seconds pixiebrix-extension#2191
• chrome.scripting.executeScript doesn't resolve/reject for frozen state tabs w3c/webextensions#527

[fregante]

This was actually partially implemented:

webext-messenger/source/sender.ts

Lines 168 to 177 in 3ac32d7

	if (browser.tabs && typeof target.tabId === "number") {
	try {
	const tabInfo = await browser.tabs.get(target.tabId);
	if (tabInfo.discarded) {
	throw new Error(errorTabWasDiscarded);
	}
	} catch {
	throw new Error(errorTabDoesntExist);
	}
	}

• Don't retry on discarded tabs #163
• 7581246

The only part missing is when the tab exists but the frame doesn't. Might still be very worth implementing