Inject environment variables into the sidecar for configuring AI Runtime

### 🚀 Feature Description and Motivation

Multiple types of information are required during the startup process of AI Runtime:
-Engine side: inference engine type, access address for engine metrics
-Model side: Remote address of the model to be loaded, download authentication information

The above information needs to be injected into the AI Runtime container through environment variables.

### Use Case

_No response_

### Proposed Solution

It is possible to pass the required information in the annotation and inject it into the environment variables of the side car, similar to the implementation of [`Istio metrics merge`](https://github.com/istio/istio/blob/455eb1d46ee25e8dbbffe8792b7a28629548c94e/pkg/kube/inject/webhook.go#L881-L908)