[issue46864] Deprecate ob_shash in BytesObject

[Inada Naoki]

Inada Naoki <songofacandy at gmail.com> added the comment:

When removed shash:

```
## small key
$ ./python -m pyperf timeit --compare-to ../cpython/python -s 'd={b"foo":1, b"bar":2, b"buzz":3}' -- 'b"key" in d'
/home/inada-n/work/python/cpython/python: ..................... 23.2 ns +- 1.7 ns
/home/inada-n/work/python/remove-bytes-hash/python: ..................... 40.0 ns +- 1.5 ns

Mean +- std dev: [/home/inada-n/work/python/cpython/python] 23.2 ns +- 1.7 ns -> [/home/inada-n/work/python/remove-bytes-hash/python] 40.0 ns +- 1.5 ns: 1.73x slower

## large key
$ ./python -m pyperf timeit --compare-to ../cpython/python -s 'd={b"foo":1, b"bar":2, b"buzz":3};k=b"key"*100' -- 'k in d'
/home/inada-n/work/python/cpython/python: ..................... 22.3 ns +- 1.2 ns
/home/inada-n/work/python/remove-bytes-hash/python: ..................... 108 ns +- 2 ns

Mean +- std dev: [/home/inada-n/work/python/cpython/python] 22.3 ns +- 1.2 ns -> [/home/inada-n/work/python/remove-bytes-hash/python] 108 ns +- 2 ns: 4.84x slower
```


I will reconsider the removal before remove the cache.
We changed code object too often. If Python 3.13 don't use so much bytes objects, we don't need to remove the hash to save some RAM.

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Added file: https://bugs.python.org/file50649/remove-bytes-hash.patch

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<https://bugs.python.org/issue46864>
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