fix: restore Load() try-catch fallback in RulesetShaderManager and ma… #2599

Job	Run time
Code Quality	1m 7s
Test (Linux, ubuntu-latest, MultiThreaded, rulesets, osu.Game.Rulesets.Osu.Tests/bin/Debug/**/osu...	1m 9s
Build only (Android)	4m 54s
Test (Windows, windows-2025-vs2026, MultiThreaded, rulesets, osu.Game.Rulesets.Osu.Tests/bin/Debu...	2m 21s
Test (Windows, windows-2025-vs2026, MultiThreaded, game, osu.Game.Tests/bin/Debug/**/osu.Game.Tes...	2m 32s
Resource Budget (Source Overrides)	24s
Build only (iOS)	1m 20s
Test (Linux, ubuntu-latest, MultiThreaded, game, osu.Game.Tests/bin/Debug/**/osu.Game.Tests.dll o...	1m 10s
Test results	8s
	15m 5s

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