This is a reland of commit b3a27f22.
Conditions needed to be switched to still ensure eager compilation
of tiered-down modules (otherwise an existing test would fail).
I opened https://crbug.com/v8/13224 to switch to lazy compilation
for tier-down.

Original change's description:
> Reland "[wasm] Refactor compilation tier computations"
>
> This is a reland of commit e50472d6.
> In {ApplyCompilationHintToInitialProgress} we would reset the baseline
> tier to {kNone} if the compilation strategy is {kDefault}, which is
> wrong. We would not generate code but also not install the lazy stub,
> so whenever we start executing the code before top-tier is ready we
> would crash.
>
> Original change's description:
> > [wasm] Refactor compilation tier computations
> >
> > The way we initialized the "compilation progress" was pretty convoluted,
> > with multiple levels of functions being called for initializing every
> > single slot.
> >
> > This CL refactors this to compute one default value for the whole
> > module, and only modifies those slots that need special handling (e.g.
> > because of compilation hints, or lazy/eager compilation after
> > deserialization).
> >
> > We also rename "liftoff_functions" to "eager_functions" in the
> > deserialization path; the idea is that those functions should get
> > eagerly compiled because we expect them to be needed during execution.
> > Usually they would be Liftoff-compiled, but it's more consistent to use
> > the existing logic to choose the baseline tier. In the default
> > configuration, this will still use Liftoff, but if Liftoff is disabled
> > we will use TurboFan instead.
> >
> > R=jkummerow@chromium.org, ahaas@chromium.org
> >
> > Bug: v8:12425
> > Change-Id: Ie58840b19efd0b1e98f1b02d5f1d4369410ed8e1
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3829606
> > Commit-Queue: Clemens Backes <clemensb@chromium.org>
> > Reviewed-by: Andreas Haas <ahaas@chromium.org>
> > Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#82521}
>
> Bug: v8:12425
> Change-Id: Ie41e63148bf6bd0e38fc07a3a514f1094d9d26cf
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3838409
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Clemens Backes <clemensb@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82585}

Bug: v8:12425, v8:13224
Change-Id: I7da418a393cd470cfbe368f12b30a045b1bf9dcd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3850841Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82688}