Support YAML output format in get commands (-o yaml)

[yashvardhan-kukreja]

What would you like to be added: Support for returning YAML outputs from gwctl get analogous to how kubectl get .... -o yaml works

Why this is needed: Needed in favor of the progress of this GEP

More details here - #2761

[yashvardhan-kukreja]

/area gwctl /assign

[yashvardhan-kukreja]

BLOCKING this on #2931

My preferred approach to this would be to implement #2931 first in a "generic" enough way so that this issue can cleanly integrated on top of it further.

[yashvardhan-kukreja]

Covering this in the PR #2940 as well

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/lifecycle stale

[gauravkghildiyal]

This has been completed as mentioned in https://github.com/kubernetes-sigs/gateway-api/issues/2932#issuecomment-2044136736

/close

[k8s-ci-robot]

@gauravkghildiyal: Closing this issue.

In response to this:

This has been completed as mentioned in https://github.com/kubernetes-sigs/gateway-api/issues/2932#issuecomment-2044136736

/close

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