[roll pigweed] pw_function: Replace implementation with alias to fit function

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/103213

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: fad492674ccf679..85c4cfc5efd72bc
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Change-Id: I9c6ce4395ca1103be228f64068a77e8b1ac2b9ef
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/105416
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