JIT: SVE - Add FFR lifetime tracking as well as test coverage for NonFaulting APIs

[TIHan]

Since we have already merged the NonFaulting SVE APIs, we need to add additional testing on their first-faulting behavior since they share the similar behavior as the FirstFaulting APIs. See #104502

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[a74nh]

priority:2 for RC1 snap : Missing testing

[JulieLeeMSFT]

@mikabl-arm, PTAL.

[kunalspathak]

Note: This is not just test coverage, but we need to also model FFR register lifetime for non-faulting APIs. So this also needs product change.