Time with different scale may be plotted unintentionally.

### Describe the bug

Specifically for data from CDF files the time scale is often `tt` but most other format are `utc` when plotting need to make sure either use astropy `time_support` or convert to same scale before calling `.datetime`.

### To Reproduce

import sunpy

sunpy.map.Map(...)
etc


### Screenshots

_No response_

### System Details

_No response_

### Installation method

pip