Fix portable is[inf|nan|_out compilation on older Linux

[malfet]

Follow up after https://github.com/pytorch/executorch/pull/3262 that didn't actually solved the problem.. By wrapping a potentially non-compliant isinf/isnan implementations into a lambda with a defined return type

Compiler should be able to optimize it out into direct function call, see https://godbolt.org/z/bqYGd47Mx

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/3272

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As of commit 8a7986c797cbdd1ce120f3283b99e3b624a6d0e3 with merge base b7b40ac67adf882e8cf50d85edbb55e5709a9694 (): :green_heart: Looks good so far! There are no failures yet. :green_heart:

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@malfet merged this pull request in pytorch/executorch@e25e5d25cfe272f0aefb6205d8f258f3928dcbfb.