Revert "[heap] Filter new test for single generation mode"

This reverts commit edbe337397.

Reason for revert: Breaking presubmit
https://logs.chromium.org/logs/v8/buildbucket/cr-buildbucket/8807931292038216513/+/u/Presubmit/stdout

/b/s/w/ir/cache/builder/v8/test/mjsunit/mjsunit.status: Error: missing file for mjsunit test wasm/stack-switching-export


Original change's description:
> [heap] Filter new test for single generation mode
>
> R=​dinfuehr@chromium.org
>
> Bug: v8:11644, v8:12191
> Change-Id: I60c6426851bb46510ec0b0df132e460bed6d6e80
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3782801
> Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#81893}

Bug: v8:11644, v8:12191
Change-Id: I52caf104ed3f13bb03dbeb009199c67e34b63732
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3782199
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#81895}

test/mjsunit/mjsunit.status

@@ -1555,7 +1555,6 @@
   # These tests rely on allocation site tracking which only works in the young generation.
   'array-constructor-feedback': [SKIP],
   'wasm/generic-wrapper': [SKIP],
-  'wasm/stack-switching-export': [SKIP],
   'regress/regress-trap-allocation-memento': [SKIP],
   'regress/regress-crbug-1151890': [SKIP],
   'regress/regress-crbug-1163184': [SKIP],