Debug info for all of bevy is present in every compiled example

## What problem does this solve or what need does it fill?
The debug information for all of bevy is found in every example we have in the repo. In debug/CI builds, this can get pretty big. On my windows machine, the *.pdb files alone are 27.9GB for all of the produced examples.

## What solution would you like?
Remove debug info and strip the binaries when building the examples.

## What alternative(s) have you considered?
Compiling them with the release profile every time.