Fixes #27121. quadlet: add Pod field to quadlet list output

[codynguyen-dev]

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Does this PR introduce a user-facing change?

quadlet: `podman quadlet list` now supports a `.Pod` field in `--format` to display which pod a container quadlet belongs to

[Honny1]

Code LGTM. Please add a test for listing quadlets to this file: https://github.com/containers/podman/blob/main/test/system/253-podman-quadlet.bats

[TomSweeneyRedHat]

Code LGTM
As @Honny1 noted, please add a test.

[codynguyen-dev]

@Honny1 just pushed the test! let me know how it looks

[Honny1]

I checked the new test. Overall, it looks good, but it fails. I added an explanation of where the problem is.

[Honny1]

The test fails because $ matches the end of the entire $output string. If you want to match the end of the line, you need to use \n.

[mheon]

/approve

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This pull-request has been approved by: codynguyen-dev, mheon

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[mheon]

Recommend changing to Pod name (if the quadlet is part of a pod - only applicable to .container files)

[mheon]

I have a documentation nit. Code LGTM.