Background

Injection behavior is changing via PRs like #2500, #2547, and #2555, particularly in the interaction between manual and auto-injection.

Proposal

Introduce integration tests to validate various dimensions of injections and annotations:

• Introduce auto inject integration tests #2595 with and without --proxy-auto-inject
• cli inject with and without auto inject
• pod deploys and deployment deploys
• linkerd.io/inject: enabled, linkerd.io/inject: disabled, and no annotation present
• pod annotations and deployment annotations
• creating and updating

Part of #2459