Backport of Propagate unknown and sensitive metadata to dynamic attributes into v1.4

[ghost]

Backport

This PR is auto-generated from #33057 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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This PR updates the jsonformat/jsondiff package to include and process the sensitive and computed metadata about the given change.

The package now handles Change objects directly, something that is only possible with the refactor in #33054. This is a good change because now it is actually processing all the information in the change instead of simple subset as it was previously.

The change also moves the logic for processing unknown and sensitive types into the shared structured package so that the differ and the jsondiff package can share the logic.

Fixes #33056

Target Release

1.4.6

Draft CHANGELOG entry

BUG FIXES

• Fix bug where the sensitive and unknown metadata wasn't being propagated to dynamic attribute types when rendering.

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