[roll] Roll fuchsia Reland "[fxfs] Enable LTO"

This reverts commit b5f18dafe4c8f12bb44c41f7c99cc9def7c9a405.

Reason for revert: Revealed flakes have been fixed

Original change's description:
> Revert "[fxfs] Enable LTO"
>
> This reverts commit 2127d5374e60c9f9d064fb567d3759116de1c4dc.
>
> Reason for revert: Possible cause of fxbug.dev/121751
>
> Original change's description:
> > [fxfs] Enable LTO
> >
> > Re-land of fxrev.dev/791112 with a slightly different approach, which is
> > used by ffx and should work.
> >
> > This gains back the performance which was lost when splitting Fxfs into
> > several crates.  See, for example, WalkDirectoryTreeWarm.
> >
> > The cost is a ~45% slowdown in compilation time for fxfs (19s -> 33s on
> > my machine).  If this ends up being problematic for productivity, we
> > could further split up Fxfs into a binary variant used for tests (which
> > won't have LTO) and another used for benchmarks and production (which
> > would have LTO), but that doesn't seem necessary given the build time is
> > still reasonable.
> >
> > Note that LTO is not applied to the unit-test suite, so building the
> > unit-test suite won't be made slower.
> >
> > Original-Bug: 119533
> > Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/799622
>
> Original-Bug: 119533
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/801236

Original-Bug: 119533
Multiply: fxfs-link-tests
Multiply: fxfs-attr-tests
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/802929
Original-Revision: 600a76762856298bf6ef298a8b49f58aa331f6e2
GitOrigin-RevId: 83a9e372a9753d381230be8ca6a6db053671f509
Change-Id: I77bc8cd2fb5024ec44a297c227702f0dd74a8991