Revert of [turbofan] ChangeFloat64ToTagged shouldn't canonicalize. (patchset #5 id:80001 of https://codereview.chromium.org/2367593003/ )

Reason for revert:
Failing on the main waterfall again (again for typedarray, even tho it passed trybots?):

https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11515/steps/Check/logs/typedarray

Original issue's description:
> [turbofan] ChangeFloat64ToTagged shouldn't canonicalize.
>
> This matches current Crankshaft/fullcodegen behavior more closely and
> thus reduces the chances that we run into unnecessary polymorphism due
> to the field representation tracking in our object model.
>
> R=jarin@chromium.org
> BUG=v8:5267
>
> Committed: https://chromium.googlesource.com/v8/v8/+/6a939714e991ebf10d56ddbd2869325cca99c0ef
> Committed: https://crrev.com/ee158e6c4cc896479a32245432a3c2fdd31bcb73
> Cr-Commit-Position: refs/heads/master@{#39692}

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5267

Review-Url: https://codereview.chromium.org/2367963002
Cr-Commit-Position: refs/heads/master@{#39694}