codeobject.c: co_tlbc NULL deref + replacement_locations leak

[lpyu001]

Bug report

Bug description:

Bug report

Bug description:

Summary

1.code_dealloc (line 2550, Py_GIL_DISABLED only): co->co_tlbc->size accessed without NULL check when init_code fails on _PyCodeArray_New → segfault.
2._PyCode_New (line 741-743): replacement_locations not DECREF'd when init_code fails.

This is a sub-issue of #146102 with gist details

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

Linked PRs

• gh-150546：Fix cleanup for co_tlbc and replacement_locations in _PyCode_New() #150549