Load community cache before serverbrowser uses it

[qxdFox]

I've been using this on my client and it's been working, haven't had any issues

• Tested the change ingame
• Provided screenshots if it is a visual change
• Tested in combination with possibly related configuration options
• Written a unit test (especially base/) or added coverage to integration test
• Considered possible null pointers and out of bounds array indexing
• Changed no physics that affect existing maps
• Tested the change with ASan+UBSan or valgrind's memcheck (optional)
• I didn't use generative AI to generate more than single-line completions
• Don't care about checkboxes

[qxdFox]

This should close SollyBunny/ddnet-custom-communities#31, not sure

[qxdFox]

and https://discord.com/channels/957377260833366116/1423328979632394301/1423328979632394301, I think

[SollyBunny]

I don't see how this helps, but it also shouldn't do any harm

[qxdFox]

The issue is that the communities arent loaded fast enough, loading them from the file in OnConsoleInit() loads them before any of the community commands can be used, which would clean any (at that point) unknown community