Add missing cellTopLabelAlignment to MessageSizeCalculator

[marcetcheverry]

See #1106

[nathantannar4]

Thanks for taking the time to make another PR @marcetcheverry 😁

When I looked at this issue I noticed that MessageContentCell.layoutCellTopLabel also needs updates for it to even use the assigned layout attributes.

Could that be added to this? Needs to look similar to layoutCellBottomLabel

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[mdescalzo]

@nathantannar4 I saw that in my poking around as well. I'm setting up a PR for it now: PR #1117

[nathantannar4]

@mdescalzo I think this should all be done in one PR, as it's for the same issue. I appreciate you taking the time to do so none the less.

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