Upgrade xplat/executorch to Python Scientific Stack 3

[rascani]

Differential Revision: D90851692

[pytorch-bot]

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[meta-codesync]

@rascani has exported this pull request. If you are a Meta employee, you can view the originating Diff in D90851692.

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[github-actions]

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[robert-kalmar]

This PR is not relevant anymore as contenwise same PR #18737 was already merged.