Update user profile overlay to show more than one tournament banner

[frenzibyte]

• Closes Only one osu! world cup supporter banner shows up on user sites within the client #25284

Preview:

[Joehuu]

Loading all banners (worst case 32 teams or more if duplicate) at once can take 2+ seconds to appear:

Untitled.mov

I would copy the badge logic to make it appear quicker:

osu/osu.Game/Overlays/Profile/Header/BadgeHeaderContainer.cs

Lines 73 to 81 in 0bbe28d

	for (int index = 0; index < badges.Length; index++)
	{
	int displayIndex = index;
	LoadComponentAsync(new DrawableBadge(badges[index]), asyncBadge =>
	{
	// load in stable order regardless of async load order.
	badgeFlowContainer.Insert(displayIndex, asyncBadge);
	}, cancellationTokenSource.Token);
	}

The banners will not appear in order, but not really noticeable as users will have at most 1 banner or none.

Edit: For the worst case though, not appearing in order by milliseconds seems better than waiting 2+ seconds to load all.

[frenzibyte]

Interesting, I was under the thought that using LoadComponentsAsync should not result in any UI thread blockage.

[frenzibyte]

Uh, I misunderstood, you mean to add the banner as soon as it is loaded rather than delaying the display until all are loaded. Sure, sounds good.