[Audio] Separate timeout for lavalink downloading

[Chovin]

What component of Red (cog, command, API) would you like to see improvements on?

Audio

Describe the enhancement you're suggesting.

Currently there is a single timeout for the combined Lavalink downloading and starting up.

Red-DiscordBot/redbot/cogs/audio/core/tasks/lavalink.py

Lines 61 to 64 in d3887b5

	await self.managed_node_controller.start(java_exec)
	# timeout is the same as ServerManager.timeout -
	# 60s in case of ServerManager(self.config, timeout=60)
	await self.managed_node_controller.wait_until_ready()

Red-DiscordBot/redbot/cogs/audio/manager.py

Lines 491 to 492 in d3887b5

	async def wait_until_ready(self, timeout: Optional[float] = None):
	await asyncio.wait_for(self.ready.wait(), timeout=timeout or self.timeout)

It'd be nice if there was a separate timeout specifically for downloading so that those with slow connections can still use managed Lavalink

Anything else?

No response