Introduce `process.name` resource attribtue

[braydonk]

Area(s)

No response

What's missing?

In #1737 I attempted to fix the semantics around process.executable.name, which were conflated with what would actually be considered the Process Name. I also introduced a process.name, but this brought up numerous concerns with how we need to handle the user experience of both process.name and process.executable.name both being present, but having different expectations across different platforms.

Describe the solution you'd like

A process.name attribute with the user-experience concerns straightened out.

[braydonk]

The original commit on #1737 is a good way to see the original proposal for process.name. The comments on that PR also have good discussion around this.

CCing all who were part of the original discussion there:
@christos68k @mjwolf @lmolkova @rockdaboot

[christos68k]

We discussed the semantics in the Profiling SIG and we think that opting for simplicity and allowing duplication is fine for this case.