perf: reduce allocations in beatmap conversion, playable bounds, and HUD components #2480

Job	Run time
Build only (Android)	13m 43s
Test (Windows, windows-2025-vs2026, MultiThreaded, rulesets, osu.Game.Rulesets.Osu.Tests/bin/Debu...	17m 33s
Code Quality	6m 30s
Test (Linux, ubuntu-latest, MultiThreaded, rulesets, osu.Game.Rulesets.Osu.Tests/bin/Debug/**/osu...	10m 24s
Build only (iOS)	3m 3s
Test (Windows, windows-2025-vs2026, MultiThreaded, game, osu.Game.Tests/bin/Debug/**/osu.Game.Tes...	55m 29s
Resource Budget (Source Overrides)	30s
Test (Linux, ubuntu-latest, MultiThreaded, game, osu.Game.Tests/bin/Debug/**/osu.Game.Tests.dll o...	30m 40s
Test results	11s
	2h 18m 3s

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