Bump typespec python 0.45.2 (#41682)

* Initial plan for issue

* Bump typespec-python to 0.45.2 and typespec-client-generator-core to 0.57.1

Co-authored-by: msyyc <70930885+msyyc@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: msyyc