Fix reverse label merge order

[mdeeks]

Helm merge behavior is not intuitive. The first value has the highest priority when merging which was not expected. This change reverses the order.

Given:

  global:
    labels:
      team: "platform"

  api:
    labels:
      team: "api-team"
    podLabels:
      team: "api-pod"

Before (global had highest priority):

• Service labels: team: "platform"
• Pod labels: team: "platform"

After (podLabels > component > global):

• Service labels: team: "api-team"
• Pod labels: team: "api-pod"