[FEATURE REQUEST] Add show_changes arg to file.(pre|ap)pend

[boltronics]

Is your feature request related to a problem? Please describe.
I don't want sensitive lines logged, but would like to use file.append or file.prepend in my state files.

Describe the solution you'd like
I'd like the show_changes argument to be available here, similar to file.managed.

Describe alternatives you've considered
Not using file.append or file.prepend. This is less than ideal.

Additional context
Lots of file.* states accept this argument. file.append and file.prepend should probably accept it too.

[sagetherage]

The PR is failing a bunch of tests, but keeping this labeled as Aluminium and in the AL milestone to plan for the AL point release