Use VolatileTip in local state query

[crocodile-dentist]

List of changes

• For testing/development purposes, it will avoid ClockSkew errors when validating signatures around epoch boundaries.

Checklist

• My changes generate no new warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works