fix(test-values): explicitly enabling docker host tls for nexus tests

General MR

Summary

This MR updates the test values for Nexus to explicitly enable TLS for containers.dev.bigbang.mil during testing pipelines. Without this change, Nexus merge pipelines will not pass.

Relevant logs/screenshots

A test evidence MR exists with this configuration: !6141 (closed)

Linked Issue

Relates to big-bang/product/packages/nexus#165 (closed)

Upgrade Notices

N/A