[Deprecation] `empty()` Numeric Compatibility

[silug]

Summary

empty() still accepts Numeric values for backwards compatibility, emits a deprecation warning, and returns false instead of raising a type error.

Evidence

• lib/puppet/functions/empty.rb:67 calls deprecation_warning_for('Numeric').
• lib/puppet/functions/empty.rb:84 warning text: Calling function empty() with Numeric value is deprecated.
• lib/puppet/functions/empty.rb:68 returns false for Numeric.
• Header docs in lib/puppet/functions/empty.rb:12 mark Numeric/Undef compatibility as deprecated.

Proposed OpenVox 9 Change

• Remove Numeric dispatch from empty().
• Make empty(<Numeric>) fail with standard type/signature error.

Compatibility / Risk

• Medium risk for manifests using empty(0)-style checks.
• Recommended migration is explicit checks, for example:
  • value =~ Numeric or
  • value == undef or
  • value == '' / value.empty depending on expected type.

Implementation Notes

• Remove dispatch :numeric_empty and numeric_empty implementation.
• Remove Numeric-specific deprecation warning helper usage.
• Keep or separately evaluate Undef compatibility behavior (tracked independently).
• Update function reference docs/signatures.

Acceptance Criteria

• empty() no longer accepts Numeric.
• No Numeric deprecation warning path remains in function implementation.
• Type/signature error is emitted for numeric input.

Suggested Tests

• Unit test ensuring empty(1) raises signature/type mismatch.
• Regression tests for supported inputs (Collection, String, Sensitive[String], Binary).

[binford2k]

Deprecated in 7d7da5a