Fix order date format in Orders Grid

[ihor-sviziev]

Description

We still have incorrect order date format in 2.1. Need to fix it. This fix removes custom date form that was defined for order grid and use default implementation:
https://github.com/magento/magento2/blob/develop/app/code/Magento/Ui/view/base/web/js/grid/columns/date.js#L18

Fixed Issues (if relevant)

1. Fix order date format in admin grid #6785: Fix order date format in admin grid
2. fixing time format on admin sales order grid #8336: fixing time format on admin sales order grid
3. Purchase date on admin screen is always *:07:00 #5651: Purchase date on admin screen is always *:07:00

Manual testing scenarios

1. Create customer, create product, create order
2. Go to admin, navigate to Sales->Orders grid
3. See the date, i.e. "Jan 30, 2017, 16:01:00 PM" (should be Jan 30, 2017, 4:01:00 PM)
4. Open the order and check the date under "Order Date"

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[hostep]

@ihor-sviziev: could it be that this PR has been reverted (maybe accidentally) in: bbaebf7#diff-f13026afcc46259a8ef9e8bc19ccf79eL189 ?

And if not done accidentally, was it done with a certain purpose, could you try to find out?

The format did change in between Magento 2.1.7 and 2.1.8 from MMM dd, YYYY, H:MM:SS A to MMM dd, YYYY, H:mm:ss A which fixes the incorrect minutes and seconds, but does not fix the AM/PM problem you described.

[ihor-sviziev]

@hostep looks like it was done by mistake. Feel free to create new PR with the same changes.