fix: fallback to ansible_user_id when using root user

[dkoshkin]

What problem does this PR solve?:
Fix from https://github.com/kubernetes-sigs/image-builder/pull/739/files#diff-2f3020c3867a75d1e2395d10238225e0fa343e8097cb434f647817e446354a88R149

Looks like when using root as the SSH user, ansible_env.SUDO_USER is not set.
Fallback to using ansible_user_id which will in this case already equal the ssh user.

Which issue(s) does this PR fix?:

• https://jira.d2iq.com/browse/D2IQ-NUMBER

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[supershal]

Thank you

[github-actions]

File	Coverage
All files	14%	❌
cmd/konvoy-image-wrapper/cmd/wrapper.go	8%	❌
cmd/konvoy-image-wrapper/image/common.go	0%	❌
cmd/konvoy-image-wrapper/image/image_not_embedded.go	0%	❌
pkg/ansible/runner.go	0%	❌
pkg/app/artifacts.go	0%	❌
pkg/app/build.go	0%	❌
pkg/app/build_azure.go	2%	❌
pkg/app/build_gcp.go	0%	❌
pkg/app/config.go	50%	❌
pkg/app/errors.go	0%	❌
pkg/app/provision.go	0%	❌
pkg/app/root.go	0%	❌
pkg/app/utils.go	7%	❌
pkg/app/validate.go	0%	❌
pkg/appansible/io.go	0%	❌
pkg/appansible/playbook.go	0%	❌
pkg/azure/azure.go	0%	❌
pkg/logging/logger.go	0%	❌
pkg/packer/manifest.go	0%	❌
pkg/packer/packer.go	0%	❌
pkg/stringutil/rand.go	0%	❌
pkg/version/info.go	8%	❌

Minimum allowed coverage is 75%

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