Resolve "Egress Whitelist - Vault"

General MR

Summary

As part of big-bang&160, we will want to enable users to configure setting REGISTRY_ONLY traffic policy on a per-package basis, in addition to allowing for it to be set globally in the meshConfig (see #1886). Creating Sidecars in each package will also allow us to focus on individual packages as we define what whitelists will need to be created per application.

Relevant logs/screenshots

Testing vault package in BigBang with egress whitelist test values. MR: big-bang/bigbang!4072 (closed)

Linked Issue

issue

Upgrade Notices

(N/A)

Closes #75 (closed)