[WIP] Fix destructors of global variables not being called

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

---

This section details on the original issue you should resolve

<issue_title>Destructors of global variables are not called</issue_title>
<issue_description>```c++
#include

struct SideEffectTracker {
int name;

explicit SideEffectTracker(int tag) : name(tag) {
    std::cout << "[CONSTRUCTOR] " << name << " initialized.\n";
}

~SideEffectTracker() {
    std::cout << "[DESTRUCTOR]  " << name << " destroyed.\n";
}

void touch() const {
    std::cout << "[USAGE]       " << name << " accessed.\n";
}

};

// 1. Global statics (Initialized before main() in order of declaration)
SideEffectTracker g_global1(1);
SideEffectTracker g_global2(2);

void run_local_statics() {
// 2. Function-local static (Lazy initialization: only runs on first call)
static SideEffectTracker s_local_static(3);
s_local_static.touch();
}

int main() {
std::cout << "=== Entering main() ===\n\n";

g_global1.touch();

std::cout << "\n-- First call to run_local_statics() --\n";
run_local_statics();

std::cout << "\n-- Second call to run_local_statics() --\n";
run_local_statics();

std::cout << "\n=== Exiting main() ===\n";
return 0;
// Static destructors run after this line in REVERSE order of construction

}

should print:

[CONSTRUCTOR] 1 initialized.
[CONSTRUCTOR] 2 initialized.
=== Entering main() ===

[USAGE] 1 accessed.

-- First call to run_local_statics() --
[CONSTRUCTOR] 3 initialized.
[USAGE] 3 accessed.

-- Second call to run_local_statics() --
[USAGE] 3 accessed.

=== Exiting main() ===
[DESTRUCTOR] 3 destroyed.
[DESTRUCTOR] 2 destroyed.
[DESTRUCTOR] 1 destroyed.

- Closes Cpp2Rust/cpp2rust#379

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes Destructors of global variables are not called #379