Renamed Exempt Delegation to Validator Bond

[sampocs]

• Renamed ExemptDelegation to ValidatorBond
• Renamed ExemptionFactor to ValidatorBondFactor
• Replaced all occurrences of "exempt" terminology

[github-advanced-security[bot]]

You have successfully added a new CodeQL configuration .github/workflows/codeql-analysis.yml:analyze. As part of the setup process, we have scanned this repository and found no existing alerts. In the future, you will see all code scanning alerts on the repository Security tab.

[faddat]

This is actually a great deal clearer.

[sampocs]

@sampocs sorry I had this pointed to the fix protogen branch so the PR was easier to review - going to open a new PR so we can merge to main