Rollup merge of #68932 - michaelwoerister:self-profile-generic-activity-args, r=wesle...

Rollup merge of #68932 - michaelwoerister:self-profile-generic-activity-args, r=wesleywiser

self-profile: Support arguments for generic_activities.

This PR adds support for recording arguments of "generic activities". The most notable use case is LLVM module names, which should be very interesting for `crox` profiles. In the future it might be interesting to add more fine-grained events for pre-query passes like macro expansion.

I tried to judiciously de-duplicate existing self-profile events with `extra_verbose_generic_activity`, now that the latter also generates self-profile events.

r? @wesleywiser