Backport of Fix no-op outputs causing the plan renderer to skip the 'no changes' message into v1.4

[teamterraform]

Backport

This PR is auto-generated from #32820 to be assessed for backporting due to the inclusion of the label 1.4-backport.

The below text is copied from the body of the original PR.

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Currently, we are checking whether the output changes are empty before deciding to print the "no changes" message in the renderer. But, no-op changes do not print anything so any plan with no-op changes will make the renderer consider the output changes to be not empty so it won't print the nice message but then it also won't print any outputs.

This PR fixes this by computing the concrete output diffs earlier and then using them to decide whether to print the "no changes" message.

Fixes #32815

Target Release

1.4.1

Draft CHANGELOG entry

BUG FIXES

• Fix the plan renderer skipping the "no changes" messages when there are no-op outputs within the plan.

[github-actions]

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[github-actions]

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