fix: sis limb-decomposition works with log-two_bound > 8

[AlexandreBelling]

Description

LimbDecompose would not work correctly if the logTwoBound is larger than 8 and would silently skips the input bits corresponding to any bytes coming after the first in every limb.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist:

• I have performed a self-review of my code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I did not modify files generated from templates
• golangci-lint does not output errors locally
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules