tooling: Validation tool cleanup (#18158)
tooling: Validation tool cleanup (#18158)

Commit Message: tooling: Validation tool cleanup
Additional Description:

This is a minor/cleanup PR to fix the docstrings in the dependency validation tool

I have separated these changes here as i have another PR to work on this file, and the cleanups were making that PR hard to review.

Signed-off-by: Ryan Northey <ea3cd978650417470535f3a4725b6b5042a6ab59@synca.io>
envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy