Default to `--presymbolicate` or some other way of saving symbols when specifying an output file

[laundmo]

Theres a few issues about sharing profiles and properly pre/re-symbolicating them

• Unable to (re)symbolificate saved profile data #83
• Output profile.json with symbolication applied #610
• When the file my_profile.json generated by Linux is opened in Windows, no function names are found. #739
• feat: add --share flag to upload profiles to profiler.firefox.com #745

Currently, the defaults mean that simply saving a profile file and sharing it doesn't work, and you need to find out about and then use other flags to make this work.

I think to make samply more broadly useful, it should default to saving profiles in such a way they can be shared and loaded, with the required features (--presymbolicate) being opt-out instead.