Sync AudioServer & AudioDriver buffer sizes and fix latency inaccuracies #52626
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This is a rebase of #38280 with some style fixes and slight changes all around. More accurately I reapplied all changes by hand, so if you've previously reviewed that PR please still look carefully at this one.
Please review paying special attention to any assumptions that may have been made about the buffer size in the AudioServer being 1024, and more recently 512. According to Ben and another developer in the comments of # #38280 it sounds like this change or some variation of it has been used in at least one shipped title, but I worry that (as an example) perhaps there's an FFT in one of the AudioEffects that will break when passed a non-power-of-two by an AudioDriver that chooses to only allocate 500 samples instead of 512, or something.
Overall this change will be an incredible help for developers that need low-latency audio, since before the AudioServer limited latency to at least the length of its hardcoded buffer.