Use LongDateTime for dates and times across the tool

This is related to:

- https://github.com/Azure/azure-sdk-tools/issues/4068

To avoid confustions, we should use the LongDateTime format in all places in which we show a date.

This means, that instead of showing `09/10/2022` we will display `September 10th 2022`, which won't cause confusion on what's the month and day in the date format.

Start by reviewing the related issue #4068 and inventory the tool's places that display dates or times. Update the displayed formats to LongDateTime so numeric dates such as 09/10/2022 are no longer ambiguous, then verify that all date displays use the requested format.

Written by the indexing model from the issue text.