chore: fix for POD_NAME and POD_NAMESPACE envs when enableHA is true

[robgordon89]

fix for POD_NAME and POD_NAMESPACE envs when enableHA is true

Also added a test case to cover it 👍

Fixes:

Error: POD_NAME not set, cannot run in HA mode without POD_NAME set

Likely introduced here #699

[stefanandres]

If you are on it, please also fix the default values for the new variables. They are mixed up:

        - name: GOMAXPROCS
          valueFrom:
            resourceFieldRef:
              resource: limits.memory
        - name: GOMEMLIMIT
          valueFrom:
            resourceFieldRef:
              resource: limits.cpu

This should be the other way around,
GOMAXPROCS = limits.cpu
GOMEMLIMIT = limits.memory

With this current default, all pods are crashing at startup with OOMKill.

[bnallapeta]

will look at the image generation issue with the pipeline later. Merging this PR for now.