Update worker slice gateway pod spec with openvpn client container resources spec

### 📜 Description

Review and add resource spec to openvpn client container.

### 👟 Reproduction steps

Create a slice with 2 clusters

### 👍 Expected behavior

Review and add resource specs to container spec.

### 👎 Actual Behavior

Missing container resource specs - please review and add default container resource specs.

### 🐚 Relevant log output

_No response_

### Version

_No response_

### 🖥️ What operating system are you seeing the problem on?

Linux

### ✅ Proposed Solution

_No response_

### 👀 Have you spent some time to check if this issue has been raised before?

- [X] I checked and didn't find any similar issue

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct

Start by locating the worker slice gateway pod spec and its openvpn client container definition. Create a slice with two clusters, then verify that the openvpn container has the expected default resource specifications.

Written by the indexing model from the issue text.