Fix locale-dependent float printing in GGUF metadata (#17331)
* Set C locale for consistent float formatting across all binaries.
* Add C locale setting to all tools binaries
Add std::setlocale(LC_NUMERIC, "C") to all 16 binaries in the tools/
directory to ensure consistent floating-point formatting.
* Apply suggestion from @JohannesGaessler
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Co-authored-by: Johannes Gäßler <johannesg@5d6.de>
