Add ability to insert entire configmap/secret into env.

[ghost]

Description

This adds a new variable to all components of the Helm Chart. extraEnvFrom – it allows inserting an entire configMap or secret via envFrom into the environment.

Motivation and Context

It is cleaner and simpler to source an entire configMap into the environment, instead of inserting each variable individually. Especially if you have default env. Vars you want to always insert like proxy settings or similar.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[CLAassistant]

All committers have signed the CLA.

[ilpianista]

LGTM! Thanks!

[diemol]

Thank you for reviewing, @ilpianista!

[diemol]

Thank you, @xcalizorz!