Merge Request "opened at" time is not in the right timezone
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### Summary
If i open a merge request and immediately make a comment, the timestamp on the comment will be in the correct timezone, but the opened at time will be UTC.
### Steps to reproduce
1. Create merge request
2. Make a comment
3. Hover over the "Opened ______ by <your name>" timestamp
4. Hover over the timestamp on the comment
5. Notice that the opened at timestamp is after the comment timestamp (in my case by 4 hours currently since I am in America/Detroit timezone)
### Example Project
https://gitlab.com/joshfriend/bunnypedia/merge_requests/36
### What is the current *bug* behavior?
MR opened at timestamp:

Commit timestamp pushed soon after opening the MR

### What is the expected *correct* behavior?
The opened at timestamp should be in my current timezone like all the other dates for comments/new commits/etc
### Relevant logs and/or screenshots
see above
### Output of checks
Reproduced on gitlab.com, see above screenshots and example MR
issue