Allow importing `strace` output into the profiler

This would be nice.

Florian notes:

> There doesn't seem to be a standard output format, you have plenty of options you can use to specify what you want in the output. But we could still write an importer that works for a specific strace command line that we could recommend.

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-394)