(anycable-go: v0.7.1) Remove default resource limits to fix partial override issues

[dumitraand]

Summary

• Remove default resources values to prevent Helm deep-merge issues when users partially override resource requests/limits
• Bump chart version to 0.7.1

Problem

When users set partial resource overrides like:

resources:
  requests:
    cpu: 1
    memory: 2G
  limits:
    memory: 2G

Helm deep-merges these with the chart defaults, resulting in:

resources:
  requests:
    cpu: 1        # 1000m from user
    memory: 2G
  limits:
    cpu: 350m     # from defaults (not overridden)
    memory: 2G

This causes Kubernetes validation errors: requests.cpu (1000m) > limits.cpu (350m) (spec.template.spec.containers[0].resources.requests: Invalid value: "1": must be less than or equal to cpu limit of 350m)

Proposed Solution

Remove default resource values so users have full control. This is a common pattern for Helm charts to avoid unexpected merge behavior.