"Fixes #2752"

[Samarth08]

Making --no-push and remote caching work with each other/

Fixes #2752

Description
• Setting NoPush to opts.NoPush instead of hardcoding it.

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• Includes unit tests
• Adds integration tests if needed.

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• The code flow looks good.
• Unit tests and or integration tests added.

Release Notes
Fixes#2752
Describe any changes here so maintainer can include it in the release notes, or delete this block.

Examples of user facing changes:
- kaniko adds a new flag `--registry-repo` to override registry

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[mschneider82]

the test failed because of go fmt was not executed on your modified file.

[Samarth08]

@JeromeJu

[aaron-prindle]

LGTM, thanks for the PR @Samarth08!