[fix]replacement the abs() with unsigned_abs()

[maldiohead]

abs() may be lead to panic in the debug mode and optimized code will return i64::MIN without a panic. so need use unsigned_abs() in here

Description

The absolute value of i64::MIN cannot be represented as an i64, and attempting to calculate it will cause an overflow. This means that code in debug mode will trigger a panic on this case and optimized code will return i64::MIN without a panic. so
in here need replace abs() with unsigned_abs()

Applicable issues

• fixes #

Additional info (benefits, drawbacks, caveats)

Checklist

• Test coverage for new or modified code paths
• Changelog is updated
• Required documentation changes (e.g., docs/rpc/openapi.yaml and rpc-endpoints.md for v2 endpoints, event-dispatcher.md for new events)
• New clarity functions have corresponding PR in clarity-benchmarking repo
• New integration test(s) added to bitcoin-tests.yml

[CLAassistant]

All committers have signed the CLA.

[wileyj]

@maldiohead can you rebase against develop and we'll take a look?

[maldiohead]

@wileyj Hey, I have rebase to the develop branch

[jbencin]

We should search and see if abs() is used elsewhere in the code also