fix CLI help example indentation

[MayorFaj]

Description

Go backtick (raw) string literals preserve all whitespace verbatim, including tabs and spaces from source code indentation. When Cobra renders the Example field in --help output, multi-line examples that were indented in source appeared with incorrect whitespace, some had tabs, others had 3 spaces, and some were flush-left.

Fix: Added an indentExamples template function registered via cobra.AddTemplateFunc that normalizes all Example strings to exactly 2-space indentation and strips leading/trailing blank lines. Updated the usage template to pipe through this function ({{.Example | indentExamples}}), and converted all ~95 multi-line Example fields across podman to flush-left raw strings so the template function handles indentation uniformly.

This is a defensive, centralized approach, future contributors simply write flush-left example strings in backticks, and the template function ensures correct display.

Checklist

• Certify you wrote the patch or otherwise have the right to pass it on as an open-source patch by signing all
  commits. (git commit -s). (If needed, use git commit -s --amend). The author email must match
  the sign-off email address. See CONTRIBUTING.md
  for more information.
• Referenced issues using Fixes: #28178 in commit message (if applicable)
• Tests have been added/updated (or no tests are needed)
• Documentation has been updated (or no documentation changes are needed)
• All commits pass make validatepr (format/lint checks)
• Release note entered in the section below (or None if no user-facing changes)

Does this PR introduce a user-facing change?

Fixed CLI `--help` output where multi-line command examples were incorrectly indented due to Go raw string literal whitespace being preserved verbatim. All examples now render with consistent 2-space indentation.

Fixes: #28178

[packit-as-a-service]

[NON-BLOCKING] Packit jobs failed. @containers/packit-build please check. Everyone else, feel free to ignore.

[jankaluza]

I think I like it. LGTM.

[Honny1]

LGTM overall, just two minor style comments (non-blocking).

[lsm5]

change LGTM.

Please squash into a single commit after addressing other comments.

[TomSweeneyRedHat]

LGTM
And my OCD loves it!
I've restarted the failing tests. Definite flakes due to some Google servers being unavailable.

[TomSweeneyRedHat]

@MayorFaj, I think you may be running into an issue with our build machines that was fixed earlier today. Could you please rebase and try pushing again?

[MayorFaj]

LGTM And my OCD loves it! I've restarted the failing tests. Definite flakes due to some Google servers being unavailable.
Glad the cleanup scratches that itch 😄. Appreciate the review

[MayorFaj]

@MayorFaj, I think you may be running into an issue with our build machines that was fixed earlier today. Could you please rebase and try pushing again?

done

[lsm5]

@MayorFaj could you PTAL at the failing tests?

[MayorFaj]

@MayorFaj could you PTAL at the failing tests?

all good now, the only failing test is not related to the PR

[Honny1]

LGTM. I reran the failed tests.

[lsm5]

LGTM