Add show_caption_above_media parameter to Defaults #4306
Description
What kind of feature are you missing? Where do you notice a shortcoming of PTB?
Currently when you want to set the show_caption_above_media parameter to every bot method that supports it (such as send_video, send_photo, edit_message_caption, etc.) you need to do so manually on each method call
Describe the solution you'd like
It would be nice to set a default value for it via the telegram.ext.Defaults class, since you typically set it everywhere anyway just for consistency sake
Describe alternatives you've considered
No response
Additional context
I would also like to contribute for this feature myself if that's fine