Instead, open a single {CodeSpaceWriteScope} that covers all functions.
Note that the exact same thing is already done in
{InitializeLazyCompilation}.

R=thibaudm@chromium.org

Bug: v8:11974, chromium:1298552
Change-Id: I469757f0674a7b95ce56ffa4d42b5e0d9d5a0834
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3474671Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79181}