fix: ENV VAR kv parsing to handle JSON values

[bHacklv]

What

• JOB_KUBE_ANNOTATIONS can have JSON as values
• This PR fixes the parsing of such values

Before fix:

Example of a valid istio k8s annotation that is incorrectly parsed without a fix:

proxy.istio.io/config={ 
"holdApplicationUntilProxyStarts": true, 
"proxyMetadata": { 
  "EXIT_ON_ZERO_ACTIVE_CONNECTIONS": "true" 
  } 
}

How

1. Parse ENV VAR value with Regex Pattern that checks for JSON values
2. Fallback to Regex Pattern that extracts k:v as it was done before with Splitter stream.

Recommended reading order

N/A

Can this PR be safely reverted and rolled back?

• YES 💚
• NO ❌

[CLAassistant]

All committers have signed the CLA.