Fix DataMirror.internal.chiselTypeClone to preserve Scala type (backport #3553)

[mergify]

This is an automatic backport of pull request #3553 done by Mergify.

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Original PR Body

See chipsalliance/rocket-chip#3476

This has been a lingering issue, about time we fixed it.

I'm going to try backporting this but it may or may not be binary compatible.

Contributor Checklist

• Did you add Scaladoc to every public function/method?
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Type of Improvement

• Bugfix

Desired Merge Strategy

• Squash

Release Notes

Reviewer Checklist (only modified by reviewer)

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