Fix AOT compilation and silence trimming warnings

[google-labs-jules]

This PR fixes a critical AOT compilation failure and addresses several trimming-related warnings in the osu! Android build.

Key changes:

1. PriorityQueue Syntax: Corrected the Linker.xml syntax for PriorityQueue2` to use the backtick character for generic arity, resolving the AOT resolution error.
2. Trimming Suppressions: Added [UnconditionalSuppressMessage] to silence audited reflection calls in core game logic and tests. This acknowledges that type preservation for critical hierarchies (Mods, Rulesets, Skins) is managed manually via Linker.xml.
3. Project Configuration: Enabled SuppressTrimAnalysisWarnings in osu.Game.csproj for Release builds to align with the Android project settings and prevent audited warnings from flooding the build logs.
4. Build Verification: Confirmed that the changes do not introduce syntax errors and the project builds successfully.

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PR created automatically by Jules for task 5084491518400624570 started by @winnerspiros

[google-labs-jules]

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