Merge 'tokio-1.25.3' into 'tokio-1.32.x' #6227
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Fixes #5946. Fixes #4782. This change adds budgeting to most of the remaining unbudgeted IO operations which can complete instantly, including datagram send/recv operations and listener socket accepts. This is particularly significant for scenarios in which resource limits are hit, as it can be common for things like listener tasks to spin when receiving errors and just log them, busy looping worker threads which might otherwise be handling existing connections and closing them. This can also sometimes lead to complex failure scenarios within datagram systems experiencing resource exhaustion.
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This is part of a LTS release for #6221. Must be merged from the command-line.