When initializing a table entry with null or a function constant, do not
go through EvaluateInitExpression. Remove the option to treat functions
lazily in EvaluateInitExpression/InitExprInterface.

Drive-by: Shrink indirect tables by removing redundant field.

Bug: chromium:1284557
Change-Id: I78a64becebf4b967b0a440d43855e163ec190b7f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3383135Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78608}