[Bug]: ProtoByteBuddyUtils should use ByteBuddyUtils.getClassLoadingStrategy

[cushon]

What happened?

ProtoByteBuddyUtils uses ClassLoadingStrategy.Default.INJECTION. See #25578, which previously migrated some uses of that strategy.

ClassLoadingStrategy.Default.INJECTION uses sun.misc.Unsafe internally, which is deprecated (https://openjdk.org/jeps/471) and the latest versions of bytebuddy warn on using that strategy on newer JDK versions (https://github.com/raphw/byte-buddy/releases/tag/byte-buddy-1.18.9)

ProtoByteBuddyUtils should be updated to use ByteBuddyUtils.getClassLoadingStrategy, or equivalent logic if it can't depend directly on ByteBuddyUtils.getClassLoadingStrategy, instead of ClassLoadingStrategy.Default.INJECTION.

Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

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[cushon]

135a559