[v22.x] Revert "v8: enable maglev on supported architectures"
src: create handle scope in FastInternalModuleStat
It needs a handle scope for the context handle. Since the FastApiCallbackOptions struct doesn't have isolate on it in V8 12.4 on Node.js 22, use Isolate::TryGetCurrent() to get to the isolate needed for the handle scope creation and fallback to the slow callback if no isolate is entered.
Revert "v8: enable maglev on supported architectures"
This reverts commit 1a5acd06.
Reason to revert: we have seen several crashes/unexpected JS behaviors with maglev on v22 (which ships V8 v12.4). The bugs lie in the codegen so it would be difficult for users to work around them or even figure out where the bugs are coming from. Some bugs are fixed in the upstream while some others probably remain. As v22 will get stuck with V8 v12.4 as LTS, it will be increasingly difficult to backport patches for them even if the bugs are fixed. So disable it by default on v22 to reduce the churn and troubles for users.