[clr-ios] Ensure must-expand intrinsics execute through R2R

[kotlarmilos]

Description

All must-expand intrinsics should execute through R2R when it is available. For scenarios where R2R is not present (for example, in interpreter-only), the same intrinsics should be executed using an interpreter implementation.

Tasks

• Identify all must-expand intrinsics that currently rely on R2R
• Verify that each intrinsic correctly executes through R2R
• Implement interpreter-based fallbacks for intrinsics when R2R data is not present
• Add tests to validate that both R2R and interpreter modes produce identical results
• Run the tests on iOS and tvOS interpreter configurations to confirm expected behavior

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [interp] Ensure that all intrinsics are compiled with R2R in shipping R2R + interpreter configurations #117948

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