This reverts commit 14d1b9e9.

Reason for revert: Increases RuntimeStats/Group-JavaScript/duration

Original change's description:
> [compiler] Make StateValuesAccess methods inlinable
> 
> This moves several simple StateValuesAccess methods as well as
> SparseInputMask::InputIterator::IsReal into their header files so they
> can be more easily inlined. This gives about a 7% improvement to the
> BackgroundSelectInstructions runtime call stat.
> 
> Also marks some methods called by the new methods as V8_PRIVATE_EXPORT
> so component build test can build.
> 
> Bug: v8:10051
> Change-Id: I3e34977a4fa660d3f4f55fd4f2c0b2370d5d2bc2
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2023559
> Reviewed-by: Georg Neis <neis@chromium.org>
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66078}

TBR=neis@chromium.org,delphick@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: v8:10051
Change-Id: I9168b524bc06562906a12a6ec0e948d6f90d4a7d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2050387Reviewed-by: Dan Elphick <delphick@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66219}