fix: validate ML-DSA s1/s2 coefficient bounds in wc_dilithium_check_key #5781

Job	Run time
build library (--enable-intelasm --enable-sp-asm --enable-all-crypto --enable-mlkem --enable-lms ...	49s
build library (--disable-asm)	29s
build library (--disable-asm --enable-mlkem --enable-lms --enable-xmss --enable-mldsa)	37s
build library (--enable-intelasm --enable-sp-asm)	35s
build library (--enable-intelasm --enable-sp-asm --enable-mlkem --enable-lms --enable-xmss --enab...	33s
build library (--disable-asm --enable-all-crypto --enable-mlkem --enable-lms --enable-xmss --enab...	49s
	3m 52s

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