gh-136459: Use platform-specific type in perf_jit_trampoline (GH-137031)

gh-136461 added perf support for macOS, with ifdefs around all changes
except increasing thread_id to 64 bits.
Make that change Apple-specific too.

Python/perf_jit_trampoline.c

@@ -214,7 +214,11 @@ struct BaseEvent {
 typedef struct {
     struct BaseEvent base;   // Common event header
     uint32_t process_id;     // Process ID where code was generated
+#if defined(__APPLE__)
     uint64_t thread_id;      // Thread ID where code was generated
+#else
+    uint32_t thread_id;      // Thread ID where code was generated
+#endif
     uint64_t vma;            // Virtual memory address where code is loaded
     uint64_t code_address;   // Address of the actual machine code
     uint64_t code_size;      // Size of the machine code in bytes