Use only the first 64 bytes of hash output in fips-hash.sh

[lealem47]

Description

Adjust the fips-hash.sh script to only take the first 64-bytes of the sed output to account for an inconsistency in the FIPS callback for module v5.2.0.1

Testing

./fips-check.sh linuxv5-RC12 keep

Checklist

• added tests
• updated/added doxygen
• updated appropriate READMEs
• Updated manual and documentation

[devin-ai-integration]

🛟 Devin Lifeguard found 1 likely issues in this PR

• check-all-return-codes snippet: Verify whether fips-check.sh is executed with ‘set -e’; if not, wrap the call in ‘if ! ./fips-hash.sh; then echo "fips-hash failed"; exit 1; fi’ (or equivalent) to handle its return code explicitly.

@lealem47
please take a look at the above issues which Devin flagged. Devin will not fix these issues automatically.