Add debug helpers to check LRE kustomization

[palfrey]

Description

Mostly trying to aid debugging the build issues with #1848

Type of change

Please delete options that aren't relevant.

• 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
  not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Github :)

Checklist

• Updated documentation if needed
• Tests added/amended
• bazel test //... passes locally
• PR is contained in a single commit, using git amend see some docs

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This change is 

[MarcusSorealheis]

Simple enough

[MarcusSorealheis]

Do we need lre at all? What does it give us exactly that the other workflows do not? No one uses it and as far as I understand, it was never complete.