[issue44340] Add support for building cpython with clang thin lto

[Dong-hee Na]

Change by Dong-hee Na <donghee.na at python.org>:


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pull_requests: +25779
pull_request: https://github.com/python/cpython/pull/27231

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44340>
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