fix(image-builder): Add kaniko api server env vars config to pred job image builder

[deadlycoconuts]

Description

Previously in https://github.com/caraml-dev/merlin/pull/621/files, a change has been made to allow the API server to propagate environment variables within its environment to the build environment of all Kaniko jobs that it spins up. However, this only happens for all Merlin web service image building jobs (and not batch prediction image building jobs) because the config KanikoAPIServerEnvVars is not passed as a field of the batch prediction image building job config.

This PR addresses this bug by simply adding the KanikoAPIServerEnvVars field as one of the new fields to create when the batch prediction image building job config gets initiliased.

Modifications

• api/cmd/api/setup.go - Add KanikoAPIServerEnvVars to batching prediction image building job config

Tests

None

Checklist

• Added PR label
• Added unit test, integration, and/or e2e tests
• Tested locally
• Updated documentation
• Update Swagger spec if the PR introduce API changes
• Regenerated Golang and Python client if the PR introduces API changes

Release Notes

NONE

[bthari]

Thank you for spotting this, LGTM!

[deadlycoconuts]

Thanks for the quick review! Haha merging this now!